, of the so-called Tri-Cities, three cities connected to each other at the confluence of the Yakima, Snake and Columbia rivers. We are in the eastern part of the state of
. Since we are practically at sea level and far from the ocean, this is one of the driest areas of the state, and one of the hottest in summer.
, sometimes even in November, cold waves are possible, during which the temperature can drop to -20 °C (-4 °F) or even below. The temperature dropped to -24 °C (-11 °F) in November 1985, -22.7 °C (-9 °F) in December 1990, -26.7 °C (-16 °F) in December 1996, -28.3 °C (-19 °F) in January 2004, and -23 °C (-9.5 °F) in December 2016.
Snowfall is quite frequent, but generally not abundant. On average, only 15 cm (6 in) of snow fall per year.
, there are several very hot days. On the hottest days of the year, the temperature generally reaches 39/40 °C (102/104 °F), but sometimes even higher. During the exceptional heat wave of late June 2021, it reached 46 (115 °F). In August 1961, at the nearby Ice Harbor Dam, a dam on the Snake River, the highest record of Washington state was set with 48 °C (118 °F).
The best times to visit Pasco 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
1,4 °C, with a minimum of
-2,3 °C and a maximum of
5,2 °C.
On the coldest nights of the month, the temperature usually drops to around
-11,5 °C. However, it dropped to
-28,3 °C in January 2004.
On the warmest days of the month, the temperature usually reaches around
15 °C. However, it reached
19,4 °C in January 1995.
Precipitation amounts to
26,2 mm, distributed over 10 days.
The day lasts on average 9 hours and 5 minutes.
The average humidity is 81%. Hence, the air is normally humid.
The average wind speed is of
9,8 kph.
February is generally a cold month. The average temperature is of
3,6 °C, with a minimum of
-2,1 °C and a maximum of
9,2 °C.
On the coldest nights of the month, the temperature usually drops to around
-10,5 °C. However, it dropped to
-26,7 °C in February 1996.
On the warmest days of the month, the temperature usually reaches around
16,5 °C. However, it reached
21,1 °C in February 1995.
Precipitation amounts to
16 mm, distributed over 8 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
10,4 kph.
March is generally a quite mild month. However, there are remarkable differences between night and day. The average temperature is of
7,7 °C, with a minimum of
0,6 °C and a maximum of
14,8 °C.
On the coldest nights of the month, the temperature usually drops to around
-6,5 °C. However, it dropped to
-18,3 °C in March 2019.
On the warmest days of the month, the temperature usually reaches around
22 °C. However, it reached
26,7 °C in March 2003.
Precipitation amounts to
17,5 mm, distributed over 8 days.
The day lasts on average 12 hours and 0 minutes.
The average humidity is 61%.
The average wind speed is of
12,2 kph.
April is generally a mild month. However, there are remarkable differences between night and day. The average temperature is of
11,5 °C, with a minimum of
3,6 °C and a maximum of
19,4 °C.
On the coldest nights of the month, the temperature usually drops to around
-3 °C. However, it dropped to
-6 °C in April 2008.
On the warmest days of the month, the temperature usually reaches around
28 °C. However, it reached
34,4 °C in April 1998.
Precipitation amounts to
16,8 mm, distributed over 7 days.
The day lasts on average 13 hours and 35 minutes.
The average humidity is 53%.
The average wind speed is of
12,9 kph.
May is generally a very mild month. However, there are remarkable differences between night and day. The average temperature is of
16,3 °C, with a minimum of
7,9 °C and a maximum of
24,7 °C.
On the coldest nights of the month, the temperature usually drops to around
0,5 °C. However, it dropped to
-2,2 °C in May 1999.
On the warmest days of the month, the temperature usually reaches around
34 °C. However, it reached
38,3 °C in May 1993.
Precipitation amounts to
18 mm, distributed over 7 days.
The day lasts on average 15 hours and 0 minutes.
The average humidity is 50%.
The average wind speed is of
12,2 kph.
June is generally a warm month. However, there are remarkable differences between night and day. The average temperature is of
19,9 °C, with a minimum of
11,4 °C and a maximum of
28,4 °C.
On the coldest nights of the month, the temperature usually drops to around
5,5 °C. However, it dropped to
2,8 °C in June 2002.
On the warmest days of the month, the temperature usually reaches around
37 °C. However, it reached
43,9 °C in June 2015.
Precipitation amounts to
15,5 mm, distributed over 5 days.
The day lasts on average 15 hours and 40 minutes. June 21, the winter solstice, is the shortest day of the year in the Southern Hemisphere.
The average humidity is 46%.
The average wind speed is of
12,4 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
23,7 °C, with a minimum of
13,8 °C and a maximum of
33,6 °C.
On the coldest nights of the month, the temperature usually drops to around
8,5 °C. However, it dropped to
5,6 °C in July 1999.
On the warmest days of the month, the temperature usually reaches around
41 °C. However, it reached
45,6 °C in July 1991.
Precipitation amounts to only
3,8 mm, distributed over 2 days.
The day lasts on average 15 hours and 20 minutes.
The average humidity is 41%.
The average wind speed is of
10,5 kph.
August is generally a warm to hot month. However, there are remarkable differences between night and day. The average temperature is of
22,9 °C, with a minimum of
13,2 °C and a maximum of
32,6 °C.
On the coldest nights of the month, the temperature usually drops to around
8 °C. However, it dropped to
4,4 °C in August 2008.
On the warmest days of the month, the temperature usually reaches around
39,5 °C. However, it reached
44 °C in August 1998.
Precipitation amounts to only
6,9 mm, distributed over 2 days.
The day lasts on average 14 hours and 0 minutes.
The average humidity is 44%.
The average wind speed is of
9,8 kph.
September is generally a very mild month. However, there are remarkable differences between night and day. The average temperature is of
17,9 °C, with a minimum of
8,7 °C and a maximum of
27,2 °C.
On the coldest nights of the month, the temperature usually drops to around
2,5 °C. However, it dropped to
-3 °C in September 2000.
On the warmest days of the month, the temperature usually reaches around
34,5 °C. However, it reached
38,3 °C in September 1998.
Precipitation amounts to only
7,9 mm, distributed over 3 days.
The day lasts on average 12 hours and 30 minutes.
The average humidity is 52%.
The average wind speed is of
9,1 kph.
October is generally a mild month. However, there are remarkable differences between night and day. The average temperature is of
11,2 °C, with a minimum of
3,6 °C and a maximum of
18,8 °C.
On the coldest nights of the month, the temperature usually drops to around
-4,5 °C. However, it dropped to
-12,8 °C in October 2002.
On the warmest days of the month, the temperature usually reaches around
27 °C. However, it reached
32,2 °C in October 1991.
Precipitation amounts to
16,8 mm, distributed over 6 days.
The day lasts on average 10 hours and 50 minutes.
The average humidity is 64%.
The average wind speed is of
9,4 kph.
November is generally a quite cold month. The average temperature is of
4,9 °C, with a minimum of
-0,1 °C and a maximum of
9,9 °C.
On the coldest nights of the month, the temperature usually drops to around
-8 °C. However, it dropped to
-21,7 °C in November 2010.
On the warmest days of the month, the temperature usually reaches around
20 °C. However, it reached
25 °C in November 1999.
Precipitation amounts to
22,1 mm, distributed over 9 days.
The day lasts on average 9 hours and 25 minutes.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is of
9,9 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
-2,6 °C and a maximum of
5 °C.
On the coldest nights of the month, the temperature usually drops to around
-11,5 °C. However, it dropped to
-23 °C in December 1996.
On the warmest days of the month, the temperature usually reaches around
15 °C. However, it reached
20,6 °C in December 2015.
Precipitation amounts to
26,2 mm, distributed over 10 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 81%. Hence, the air is normally humid.
The average wind speed is of
9,5 kph.