, with cold winters and hot summers. The scarce rainfall occurs in the cold semester, while the summer is sunny.
, 400 meters (1,300 ft) above sea level. A short distance away, we find the valley of the Columbia River, where the city of Hermiston is located.
, cold waves are possible, during which the temperature can drop to -20 °C (-4 °F) or even below. In December 1990, it reached -26.7 °C (-16 °F). Snowfalls are quite frequent, but generally not abundant. On average, 40 cm (15.7 in) of snow fall per year.
, there are several very hot days. On the hottest days of the year, the temperature generally reaches 38/39 °C (100/102° F), but sometimes even higher. At the end of June 2021, during an exceptional heat wave, the temperature reached 47.2 °C (117 °F).
The best times to visit Pendleton are spring and autumn, and in particular the months of May and September, to avoid both the winter cold and the summer heat.
. Here are the average temperatures.
January is generally a cold month. The average temperature is of
1.6 °C, with a minimum of
-2.2 °C and a maximum of
5.4 °C.
On the coldest nights of the month, the temperature usually drops to around
-11.5 °C. However, it dropped to
-23.9 °C in January 1996.
On the warmest days of the month, the temperature usually reaches around
16 °C. However, it reached
20.6 °C in January 2012.
Precipitation amounts to
40 mm, distributed over 12 days.
The day lasts on average 9 hours and 10 minutes.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is of
11.4 kph.
February is generally a cold month. The average temperature is of
3.3 °C, with a minimum of
-1.3 °C and a maximum of
8 °C.
On the coldest nights of the month, the temperature usually drops to around
-9 °C. However, it dropped to
-24.5 °C in February 1996.
On the warmest days of the month, the temperature usually reaches around
17 °C. However, it reached
23.9 °C in February 1996.
Precipitation amounts to
30 mm, distributed over 10 days.
The day lasts on average 10 hours and 25 minutes.
The average humidity is 74%. Hence, the air is normally humid.
The average wind speed is of
12.3 kph.
March is generally a quite mild month. The average temperature is of
6.9 °C, with a minimum of
0.9 °C and a maximum of
12.8 °C.
On the coldest nights of the month, the temperature usually drops to around
-5 °C. However, it dropped to
-17.2 °C in March 1993.
On the warmest days of the month, the temperature usually reaches around
20.5 °C. However, it reached
26.7 °C in March 2004.
Precipitation amounts to
35 mm, distributed over 12 days.
The day lasts on average 12 hours and 0 minutes.
The average humidity is 65%.
The average wind speed is of
14.2 kph.
April is generally a mild month. However, there are remarkable differences between night and day. The average temperature is of
10 °C, with a minimum of
3.5 °C and a maximum of
16.6 °C.
On the coldest nights of the month, the temperature usually drops to around
-2 °C. However, it dropped to
-5 °C in April 2007.
On the warmest days of the month, the temperature usually reaches around
25.5 °C. However, it reached
31 °C in April 1998.
Precipitation amounts to
30 mm, distributed over 10 days.
The day lasts on average 13 hours and 35 minutes.
The average humidity is 58%.
The average wind speed is of
15.3 kph.
May is generally a mild month. However, there are remarkable differences between night and day. The average temperature is of
14.4 °C, with a minimum of
7.2 °C and a maximum of
21.6 °C.
On the coldest nights of the month, the temperature usually drops to around
1 °C. However, it dropped to
-3.3 °C in May 2013.
On the warmest days of the month, the temperature usually reaches around
31.5 °C. However, it reached
36.1 °C in May 1993.
Precipitation amounts to
35 mm, distributed over 10 days.
The day lasts on average 15 hours and 0 minutes. So the days are long.
The average humidity is 54%.
The average wind speed is of
14.6 kph.
June is generally a warm month. However, there are remarkable differences between night and day. The average temperature is of
18.1 °C, with a minimum of
10.4 °C and a maximum of
25.8 °C.
On the coldest nights of the month, the temperature usually drops to around
5 °C. However, it dropped to
1.7 °C in June 1991.
On the warmest days of the month, the temperature usually reaches around
35 °C. However, it reached
42.8 °C in June 2015.
Precipitation amounts to
25 mm, distributed over 6 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.
The average humidity is 47%.
The average wind speed is of
15.1 kph.
July, the warmest month of the year, is generally a warm to hot month. However, there are remarkable differences between night and day. The average temperature is of
22.8 °C, with a minimum of
13.7 °C and a maximum of
31.8 °C.
On the coldest nights of the month, the temperature usually drops to around
8.5 °C. However, it dropped to
5 °C in July 2012.
On the warmest days of the month, the temperature usually reaches around
39 °C. However, it reached
42.8 °C in July 2002.
Precipitation amounts to only
5 mm, distributed over 2 days.
The day lasts on average 15 hours and 20 minutes. So the days are long.
The average humidity is 35%.
The average wind speed is of
14.2 kph.
August is generally a warm month. However, there are remarkable differences between night and day. The average temperature is of
22.1 °C, with a minimum of
13.3 °C and a maximum of
30.9 °C.
On the coldest nights of the month, the temperature usually drops to around
8 °C. However, it dropped to
5.6 °C in August 1993.
On the warmest days of the month, the temperature usually reaches around
38.5 °C. However, it reached
43.3 °C in August 1998.
Precipitation amounts to
10 mm, distributed over 2 days.
The day lasts on average 14 hours and 0 minutes.
The average humidity is 36%.
The average wind speed is of
13.7 kph.
September is generally a very mild month. However, there are remarkable differences between night and day. The average temperature is of
17.5 °C, with a minimum of
9.4 °C and a maximum of
25.6 °C.
On the coldest nights of the month, the temperature usually drops to around
3.5 °C. However, it dropped to
-1.1 °C in September 2000.
On the warmest days of the month, the temperature usually reaches around
34 °C. However, it reached
37.8 °C in September 1998.
Precipitation amounts to
15 mm, distributed over 4 days.
The day lasts on average 12 hours and 30 minutes.
The average humidity is 44%.
The average wind speed is of
12.9 kph.
October is generally a mild month. However, there are remarkable differences between night and day. The average temperature is of
10.8 °C, with a minimum of
4.1 °C and a maximum of
17.5 °C.
On the coldest nights of the month, the temperature usually drops to around
-3.5 °C. However, it dropped to
-11.1 °C in October 2019.
On the warmest days of the month, the temperature usually reaches around
27 °C. However, it reached
32.8 °C in October 2008.
Precipitation amounts to
30 mm, distributed over 8 days.
The day lasts on average 10 hours and 55 minutes.
The average humidity is 60%.
The average wind speed is of
12.5 kph.
November is generally a quite cold month. The average temperature is of
4.8 °C, with a minimum of
0.2 °C and a maximum of
9.5 °C.
On the coldest nights of the month, the temperature usually drops to around
-7.5 °C. However, it dropped to
-21.1 °C in November 2010.
On the warmest days of the month, the temperature usually reaches around
19 °C. However, it reached
27 °C in November 1999.
Precipitation amounts to
35 mm, distributed over 12 days.
The day lasts on average 9 hours and 30 minutes.
The average humidity is 75%. Hence, the air is normally humid.
The average wind speed is of
12.2 kph.
December, the coldest month of the year, is generally a cold month. The average temperature is of
1.2 °C, with a minimum of
-2.5 °C and a maximum of
4.9 °C.
On the coldest nights of the month, the temperature usually drops to around
-11 °C. However, it dropped to
-23.3 °C in December 2008.
On the warmest days of the month, the temperature usually reaches around
15.5 °C. However, it reached
18.9 °C in December 2004.
Precipitation amounts to
40 mm, distributed over 12 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.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is of
11.8 kph.