Climate - Astoria (Oregon)

The climate of Astoria is oceanic, with quite mild, rainy winters and cool, quite sunny summers.
The town is located in the northern part of the Oregon coast, at the 46th parallel, on the Columbia River Estuary, beyond which we find the state of Washington. In the cold semester, fog can form, at night and in the early morning. The rains are very frequent from November to February, while in spring they gradually become less frequent, and reach a minimum in July and August, when there are many sunny days.
Winter is not very cold, but it is wet and rainy. Sometimes, there may be short cold periods, in which the nighttime temperature drops below freezing, and the daytime temperature rises slightly above freezing. Sometimes it can even snow. On the coldest nights of the year, the temperature generally drops to -4/-6 °C (21/25 °F), but can sometimes drop below. In December 2013, it went down to -10 °C (14 °C), and in December 1990, to as low as -14 °C (7 °F).
Summer is particularly cool: the maximum temperature remains around 20 °C (68 °F) even in July and August. Also, in the afternoon, a lively breeze blows from the sea, cool if not cold.
On rare occasions, the temperature can reach 30/33 °C (86/91 °F), when a bit of hot air arrives from the California deserts, but even in these cases, at night, the temperature returns cool due to the sea breeze.
At the end of June 2021, during an exceptional heat wave, the temperature reached 38.3 °C (100.9 °F).
The average temperature of the coldest month (December) is of 6.2 °C (43.2 °F), that of the warmest month (August) is of 16.3 °C (61.3 °F). Here are the average temperatures.

Precipitation amounts to 1,785 millimeters (70.3 inches) per year: it is therefore abundant. It ranges from 20 mm (0.8 in) in the driest month (July) to 280 mm (11 in) in the wettest (November). Here is the average precipitation.

On average, there are around 2,265 sunshine hours per year. Here are the average sunshine hours per day.

The sea temperature ranges between 9 °C (48 °F) and 14.5 °C (58 °F). So, it is cold all year round. Here are the average sea temperatures.

Best Time

The best time to visit Astoria is from June to September, as it is the mildest and driest of the year.

Back to the climate of Oregon.

Astoria - Weather by month

Based on the period 1991-2020

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In January, the weather in Astoria is usually quite cold. The average temperature is of 6.5 °C (44 °F), with a minimum of 3.4 °C (38.1 °F) and a maximum of 9.7 °C (49.4 °F).
On the coldest nights of the month, the temperature usually drops to around -2.5 °C (27 °F). However, it dropped to -8.9 °C (16 °F) in January 1993.
On the warmest days of the month, the temperature usually reaches around 15 °C (59 °F). However, it reached 19 °C (66.2 °F) in January 2005.
Precipitation amounts to 270 mm (10.6 in), distributed over 22 days.
The day lasts on average 9 hours and 5 minutes.
There are on average 3 hours of sunshine per day. So, the sun shines 31% of the time.
The average humidity is 84%. Hence, the air is normally humid.
The average wind speed is 13 kph (8 mph).
The average sea temperature is of 9 °C (48.5 °F). Therefore, the sea is very cold for swimming.

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In February, the weather in Astoria is usually quite mild. The average temperature is of 6.8 °C (44 °F), with a minimum of 3 °C (37.4 °F) and a maximum of 10.5 °C (50.9 °F).
On the coldest nights of the month, the temperature usually drops to around -3 °C (27 °F). However, it dropped to -6.2 °C (20.8 °F) in February 1996.
On the warmest days of the month, the temperature usually reaches around 16.5 °C (61.5 °F). However, it reached 22.2 °C (72 °F) in February 1996.
Precipitation amounts to 180 mm (7.1 in), distributed over 19 days.
The day lasts on average 10 hours and 25 minutes.
There are on average 4 hours of sunshine per day. So, the sun shines 39% of the time.
The average humidity is 81%. Hence, the air is normally humid.
The average wind speed is 13 kph (8 mph).
The average sea temperature is of 9 °C (48 °F). Therefore, the sea is very cold for swimming.

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In March, the weather in Astoria is usually quite mild. The average temperature is of 7.8 °C (46 °F), with a minimum of 3.9 °C (39 °F) and a maximum of 11.7 °C (53 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around -1.5 °C (29.5 °F). However, it dropped to -3.3 °C (26.1 °F) in March 2012.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 18.5 °C (65.5 °F). However, it reached 25 °C (77 °F) in March 2019.
Precipitation amounts to 200 mm (7.9 in), distributed over 22 days.
The day lasts on average 12 hours and 0 minutes.
There are on average 6 hours of sunshine per day. So, the sun shines 48% of the time.
The average humidity is 81%. Hence, the air is normally humid.
The average wind speed is 13 kph (8 mph).
The average sea temperature is of 9.5 °C (48.5 °F). Therefore, the sea is very cold for swimming.

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In April, the weather in Astoria is usually mild. The average temperature is of 9.3 °C (49 °F), with a minimum of 5.3 °C (41.5 °F) and a maximum of 13.3 °C (55.9 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 0.5 °C (33.5 °F). However, it dropped to -1.7 °C (28.9 °F) in April 2008.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 22 °C (71.5 °F). However, it reached 29.4 °C (84.9 °F) in April 2016.
Precipitation amounts to 145 mm (5.7 in), distributed over 19 days.
The day lasts on average 13 hours and 35 minutes.
There are on average 7 hours of sunshine per day. So, the sun shines 52% of the time.
The average humidity is 80%. Hence, the air is normally humid.
The average wind speed is 12 kph (8 mph).
The average sea temperature is of 10 °C (50 °F). Therefore, the sea is very cold for swimming.

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In May, the weather in Astoria is usually mild. The average temperature is of 11.9 °C (53 °F), with a minimum of 7.9 °C (46.3 °F) and a maximum of 15.8 °C (60.5 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 3 °C (37.5 °F). However, it dropped to 0 °C (32 °F) in May 2013.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 26 °C (79 °F). However, it reached 33.9 °C (93 °F) in May 2008.
Precipitation amounts to 85 mm (3.3 in), distributed over 16 days.
The day lasts on average 15 hours and 0 minutes. So the days are long.
There are on average 8.5 hours of sunshine per day. So, the sun shines 56% of the time.
The average humidity is 80%. Hence, the air is normally humid.
The average wind speed is 12 kph (7 mph).
The average sea temperature is of 11.5 °C (53 °F). Therefore, the sea is very cold for swimming.

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In June, the weather in Astoria is usually mild. The average temperature is of 14.1 °C (57 °F), with a minimum of 10.3 °C (50.6 °F) and a maximum of 17.8 °C (64 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 6 °C (43 °F). However, it dropped to 3.9 °C (39 °F) in June 2001.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 26.5 °C (79.5 °F). However, it reached 33.9 °C (93 °F) in June 2017.
Precipitation amounts to 60 mm (2.4 in), distributed over 14 days.
The day lasts on average 15 hours and 40 minutes. So the days are long. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
There are on average 9 hours of sunshine per day. So, the sun shines 58% of the time.
The average humidity is 80%. Hence, the air is normally humid.
The average wind speed is 12 kph (8 mph).
The average sea temperature is of 13 °C (56 °F). Therefore, the sea is very cold for swimming.

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In July, the weather in Astoria is usually very mild. The average temperature is of 15.9 °C (61 °F), with a minimum of 12.2 °C (53.9 °F) and a maximum of 19.7 °C (67.4 °F).
On the coldest nights of the month, the temperature usually drops to around 8.5 °C (47 °F). However, it dropped to 6 °C (42.8 °F) in July 2008.
On the warmest days of the month, the temperature usually reaches around 27.5 °C (81.5 °F). However, it reached 35.6 °C (96.1 °F) in July 2004.
Precipitation amounts to 20 mm (0.8 in), distributed over 8 days.
The day lasts on average 15 hours and 20 minutes. So the days are long.
There are on average 10 hours of sunshine per day. So, the sun shines 66% of the time.
The average humidity is 81%. Hence, the air is normally humid.
The average wind speed is 13 kph (8 mph).
The average sea temperature is of 14.5 °C (58 °F). Therefore, the sea is very cold for swimming.

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In August, the warmest month of the year, the weather in Astoria is usually very mild. The average temperature is of 16.3 °C (61 °F), with a minimum of 12.2 °C (53.9 °F) and a maximum of 20.4 °C (68.7 °F).
On the coldest nights of the month, the temperature usually drops to around 8 °C (46.5 °F). However, it dropped to 5.6 °C (42.1 °F) in August 1991.
On the warmest days of the month, the temperature usually reaches around 28.5 °C (83.5 °F). However, it reached 36.7 °C (98.1 °F) in August 2016.
Precipitation amounts to 30 mm (1.2 in), distributed over 8 days.
The day lasts on average 14 hours and 0 minutes.
There are on average 9 hours of sunshine per day. So, the sun shines 65% of the time.
The average humidity is 82%. Hence, the air is normally humid.
The average wind speed is 12 kph (7 mph).
The average sea temperature is of 14.5 °C (58.5 °F). Therefore, the sea is very cold for swimming.

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In September, the weather in Astoria is usually very mild. The average temperature is of 15.0 °C (59 °F), with a minimum of 10.3 °C (50.5 °F) and a maximum of 19.8 °C (67.6 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 5.5 °C (42 °F). However, it dropped to 2.2 °C (36 °F) in September 2000.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 27.5 °C (81.5 °F). However, it reached 33 °C (91.4 °F) in September 2009.
Precipitation amounts to 70 mm (2.8 in), distributed over 10 days.
The day lasts on average 12 hours and 30 minutes.
There are on average 8 hours of sunshine per day. So, the sun shines 62% of the time.
The average humidity is 82%. Hence, the air is normally humid.
The average wind speed is 11 kph (7 mph).
The average sea temperature is of 14.5 °C (58 °F). Therefore, the sea is very cold for swimming.

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In October, the weather in Astoria is usually mild. The average temperature is of 11.6 °C (53 °F), with a minimum of 7.2 °C (44.9 °F) and a maximum of 15.9 °C (60.7 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 1.5 °C (34.5 °F). However, it dropped to -2 °C (28.4 °F) in October 2002.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 23.5 °C (74.5 °F). However, it reached 28.3 °C (82.9 °F) in October 1991.
Precipitation amounts to 170 mm (6.7 in), distributed over 17 days.
The day lasts on average 10 hours and 50 minutes.
There are on average 5 hours of sunshine per day. So, the sun shines 46% of the time.
The average humidity is 83%. Hence, the air is normally humid.
The average wind speed is 11 kph (7 mph).
The average sea temperature is of 13 °C (55 °F). Therefore, the sea is very cold for swimming.

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In November, the weather in Astoria is usually quite mild. The average temperature is of 8.3 °C (47 °F), with a minimum of 4.6 °C (40.2 °F) and a maximum of 12 °C (53.6 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around -1.5 °C (29.5 °F). However, it dropped to -6 °C (21.2 °F) in November 2010.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 17.5 °C (63 °F). However, it reached 22.8 °C (73 °F) in November 2010.
Precipitation amounts to 280 mm (11 in), distributed over 21 days.
The day lasts on average 9 hours and 25 minutes.
There are on average 3 hours of sunshine per day. So, the sun shines 30% of the time.
The average humidity is 84%. Hence, the air is normally humid.
The average wind speed is 12 kph (8 mph).
The average sea temperature is of 11 °C (52 °F). Therefore, the sea is very cold for swimming.

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In December, the coldest month of the year, the weather in Astoria is usually quite cold. The average temperature is of 6.2 °C (43 °F), with a minimum of 3.1 °C (37.6 °F) and a maximum of 9.3 °C (48.7 °F).
On the coldest nights of the month, the temperature usually drops to around -3 °C (27 °F). However, it dropped to -10 °C (14 °F) in December 2013.
On the warmest days of the month, the temperature usually reaches around 14.5 °C (58 °F). However, it reached 17.2 °C (63 °F) in December 1995.
Precipitation amounts to 270 mm (10.6 in), distributed over 22 days.
The day lasts on average 8 hours and 40 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
There are on average 2.5 hours of sunshine per day. So, the sun shines 27% of the time.
The average humidity is 84%. Hence, the air is normally humid.
The average wind speed is 13 kph (8 mph).
The average sea temperature is of 10 °C (49.5 °F). Therefore, the sea is very cold for swimming.