Climate and monthly weather forecastChinook, WA
Climate and monthly weather forecast
Weather in January
January, the same as December, in Chinook, Washington, is a frosty winter month, with temperature in the range of an average high of 47.7°F (8.7°C) and an average low of 42.1°F (5.6°C). The transition into January shows a subtle variation to a still frosty 47.7°F (8.7°C) from December's 46.8°F (8.2°C) in the average high-temperature. Weather in January »Weather in February
The last month of the winter, February, is another chilly month in Chinook, Washington, with an average temperature ranging between max 47.5°F (8.6°C) and min 41.9°F (5.5°C). The onset of February notes an average high-temperature of a still chilly 47.5°F (8.6°C), subtly shifted from January's 47.7°F (8.7°C). Weather in February »Weather in March
March, the first month of the spring in Chinook, is still a chilly month, with temperature in the range of an average low of 42.6°F (5.9°C) and an average high of 49.5°F (9.7°C). March's advent notes a subtle adjustment in average high-temperature to a still chilly 49.5°F (9.7°C) from February. Weather in March »Weather in April
April in Chinook, Washington, is a cool spring month, with an average temperature ranging between max 51.8°F (11°C) and min 45.1°F (7.3°C). Chinook's weather in April displays an average high-temperature of a cool 51.8°F (11°C), showing minor disparity from March's 49.5°F (9.7°C). Weather in April »Weather in May
The last month of the spring, May, is a moderate month in Chinook, Washington, with an average temperature ranging between max 55.9°F (13.3°C) and min 48.7°F (9.3°C). As Chinook transitions from April to May, the average high-temperatures adjust to a moderate 55.9°F (13.3°C), nearly the same as the previous 51.8°F (11°C). Weather in May »Weather in June
June, the first month of the summer in Chinook, is still a mild month, with temperature in the range of an average high of 59.5°F (15.3°C) and an average low of 52.3°F (11.3°C). Chinook ushers in June with an average high-temperature of a still refreshing 59.5°F (15.3°C), showing a close resemblance to the previous month. Weather in June »Weather in July
July in Chinook, Washington, is an enjoyable summer month, with an average temperature fluctuating between 63.1°F (17.3°C) and 54.7°F (12.6°C). Chinook notes an average high-temperature of an enjoyable 63.1°F (17.3°C) in July, hardly diverging from June. Weather in July »Weather in August
August, the last month of the summer in Chinook, is also an enjoyable month, with an average temperature ranging between max 63.9°F (17.7°C) and min 55.9°F (13.3°C). In Chinook, the peak temperatures are generally noted in August, averaging a high of 63.9°F (17.7°C) and a low of 55.9°F (13.3°C). Weather in August »Weather in September
September, the first month of the autumn in Chinook, is still a refreshing month, with an average temperature varying between 55°F (12.8°C) and 62.6°F (17°C). With the advent of September, Chinook experiences an average high-temperature of a still enjoyable 62.6°F (17°C), mirroring a close resemblance to the previous month. Weather in September »Weather in October
October, like September, is a moderate autumn month in Chinook, Washington, with an average temperature ranging between max 57.9°F (14.4°C) and min 50.9°F (10.5°C). Chinook records an average high-temperature of a still refreshing 57.9°F (14.4°C) in October, maintaining a close correlation with September's 62.6°F (17°C). Weather in October »Weather in November
November, the last month of the autumn in Chinook, is another cool month, with temperature in the range of an average low of 45.9°F (7.7°C) and an average high of 51.6°F (10.9°C). November is marked by a subtle drop in average high-temperatures, transitioning from a mild 57.9°F (14.4°C) in October to a cool 51.6°F (10.9°C). Weather in November »Weather in December
December, the first month of the winter in Chinook, is still a chilly month, with an average temperature varying between 46.8°F (8.2°C) and 41.5°F (5.3°C). Chinook's coldest month, December, registers temperatures that range from a high of 46.8°F (8.2°C) to a low of 41.5°F (5.3°C). Weather in December »Updated: Jul 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Throughout the year, there are 165.1 rainfall days, and 19.92" (506mm) of precipitation is accumulated.
Months with snowfall in Chinook are January, February and September.
In Chinook, during the entire year, snow falls for 1.8 days and aggregates up to 0.47" (12mm) of snow.
The month with the least sunshine is January, with an average of 3.8h of sunshine.
The month with the most snowfall is February, when snow falls for 0.8 days and typically aggregates up to 0.31" (8mm) of snow.
The months with the lowest UV index are February, November and December, with an average maximum UV index of 2.
March through August, October through December are months without snowfall in Chinook.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.
The least humid month is April, with an average relative humidity of 80%.
May through September, with an average maximum UV index of 4, are months with the highest UV index.
The month with the longest days is June, with an average of 15h and 42min of daylight.
The month with the least rainfall is July, when the rain falls for 7.8 days and typically collects 0.35" (9mm) of precipitation.
The month with the most sunshine in Chinook is July, with an average of 9.7h of sunshine.
August, with its high-temperature average of 63.9°F (17.7°C) and a low-temperature average of 55.9°F (13.3°C), is the warmest month.
The most humid month is August, with an average relative humidity of 86%.
Temperature readings reach their annual highs in December, averaging 46.8°F (8.2°C) and a minimum average of 41.5°F (5.3°C).
December is the month with the most rainfall. Rain falls for 17.9 days and accumulates 3.31" (84mm) of precipitation.
December has the shortest days of the year, with an average of 8h and 42min of daylight.
Average temperature
Chinook, WA
The warmest month (with the highest average high temperature) is August (63.9°F).
The month with the lowest average high temperature is December (46.8°F).
The month with the highest average low temperature is August (55.9°F).
The coldest month (with the lowest average low temperature) is December (41.5°F).
Average pressure
Chinook, WA
- Average pressure in January:
30.07"Hg - Average pressure in February:
30.05"Hg - Average pressure in March:
30.01"Hg - Average pressure in April:
30.07"Hg - Average pressure in May:
30.06"Hg - Average pressure in June:
30.07"Hg
- Average pressure in July:
30.08"Hg - Average pressure in August:
30.03"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.03"Hg - Average pressure in December:
30.06"Hg
The month with the highest atmospheric pressure is July (30.08"Hg).
The month with the lowest atmospheric pressure is March (30.01"Hg).
Average wind speed
Chinook, WA
- Average wind speed in January:
11.9mph - Average wind speed in February:
10.6mph - Average wind speed in March:
10.8mph - Average wind speed in April:
9.8mph - Average wind speed in May:
8.5mph - Average wind speed in June:
8.1mph
- Average wind speed in July:
7.8mph - Average wind speed in August:
7.1mph - Average wind speed in September:
7.8mph - Average wind speed in October:
9.5mph - Average wind speed in November:
11.4mph - Average wind speed in December:
11.3mph
The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest month (with the lowest average wind speed) is August (7.1mph).
Average humidity
Chinook, WA
The month with the highest relative humidity is August (86%).
The month with the lowest relative humidity is April (80%).
Average rainfall
Chinook, WA
- Average rainfall in January:
2.8" - Average rainfall in February:
2.01" - Average rainfall in March:
1.89" - Average rainfall in April:
1.42" - Average rainfall in May:
0.79" - Average rainfall in June:
0.83"
- Average rainfall in July:
0.35" - Average rainfall in August:
0.47" - Average rainfall in September:
0.94" - Average rainfall in October:
1.97" - Average rainfall in November:
3.15" - Average rainfall in December:
3.31"
The wettest month (with the highest rainfall) is December (3.31").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days
Chinook, WA
- Average rainfall days in January:
16.8 days - Average rainfall days in February:
17.1 days - Average rainfall days in March:
17.8 days - Average rainfall days in April:
16.1 days - Average rainfall days in May:
11.1 days - Average rainfall days in June:
10.1 days
- Average rainfall days in July:
7.8 days - Average rainfall days in August:
6.7 days - Average rainfall days in September:
9.9 days - Average rainfall days in October:
15.3 days - Average rainfall days in November:
18.5 days - Average rainfall days in December:
17.9 days
The month with the highest number of rainy days is November (18.5 days).
The month with the least rainy days is August (6.7 days).
Average snowfall
Chinook, WA
The month with the highest snowfall is February (0.31").
The months with the least snowfall are March, April, May, June, July, August, October, November and December (0").
Average snowfall days
Chinook, WA
- Average snowfall days in January:
0.4 days - Average snowfall days in February:
0.8 days - Average snowfall days in March:
0.1 days - Average snowfall days in April:
0 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0.1 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0.1 days - Average snowfall days in December:
0.3 days
The month with the highest number of snowfall days is February (0.8 days).
The months with the least snowfall days are April, May, June, July, August and October (0 days).
Average daylight / Average sunshine
Chinook, WA
- Average daylight in January:
9h and 6min - Average daylight in February:
10h and 24min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 36min - Average daylight in May:
15h and 0min - Average daylight in June:
15h and 42min
- Average daylight in July:
15h and 24min - Average daylight in August:
14h and 6min - Average daylight in September:
12h and 30min - Average daylight in October:
10h and 54min - Average daylight in November:
9h and 24min - Average daylight in December:
8h and 42min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in January:
3h and 48min - Average sunshine in February:
3h and 54min - Average sunshine in March:
5h and 42min - Average sunshine in April:
7h and 24min - Average sunshine in May:
8h and 12min - Average sunshine in June:
8h and 48min
- Average sunshine in July:
9h and 42min - Average sunshine in August:
9h and 36min - Average sunshine in September:
8h and 42min - Average sunshine in October:
5h and 12min - Average sunshine in November:
4h and 24min - Average sunshine in December:
4h and 6min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days
Chinook, WA
- Average sunshine days in January:
12.4 days - Average sunshine days in February:
9.1 days - Average sunshine days in March:
10.5 days - Average sunshine days in April:
10.9 days - Average sunshine days in May:
16.7 days - Average sunshine days in June:
16.3 days
- Average sunshine days in July:
19 days - Average sunshine days in August:
20.3 days - Average sunshine days in September:
17.1 days - Average sunshine days in October:
14 days - Average sunshine days in November:
8.9 days - Average sunshine days in December:
11.1 days
The month with the most sunshine days is August (20.3 days).
The month with the least sunshine days is November (8.9 days).
Average UV index
Chinook, WA
The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are February, November and December (UV index 2).
Average cloud cover
Chinook, WA
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 37).
Average visibility
Chinook, WA
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
