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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January is a frosty winter month in Chehalis, Washington, with temperature in the range of an average low of 33.8°F (1°C) and an average high of 44.6°F (7°C). A minor adjustment in Chehalis's average high-temperature is noted with the start of January, touching a chilly 44.6°F (7°C) from December's 42.6°F (5.9°C). Weather in January »
Weather in February
The last month of the winter, February, is another chilly month in Chehalis, Washington, with an average temperature varying between 33.4°F (0.8°C) and 46.4°F (8°C). As Chehalis transitions from January to February, the average high-temperatures adjust to a still frosty 46.4°F (8°C), nearly the same as the previous 44.6°F (7°C). Weather in February »
Weather in March
The first month of the spring, March, is a cool month in Chehalis, Washington, with temperature in the range of an average high of 50.5°F (10.3°C) and an average low of 35.1°F (1.7°C). As Chehalis steps into March, the average high-temperature holds at a fresh 50.5°F (10.3°C), hinting at a minor fluctuation from the prior month. Weather in March »
Weather in April
April is a moderate spring month in Chehalis, Washington, with an average temperature ranging between max 56.1°F (13.4°C) and min 36.9°F (2.7°C). With the onset of April, the average high-temperature subtly transitions from a fresh 50.5°F (10.3°C) in March to a refreshing 56.1°F (13.4°C). Weather in April »
Weather in May
The last month of the spring, May, is a refreshing month in Chehalis, Washington, with an average temperature fluctuating between 40.8°F (4.9°C) and 64.8°F (18.2°C). Chehalis in May observes a minor temperature shift, with average high-temperatures adjusting from a moderate 56.1°F (13.4°C) in April to a comfortable 64.8°F (18.2°C). Weather in May »
Weather in June
The first month of the summer, June, is a pleasant month in Chehalis, Washington, with an average temperature varying between 69.4°F (20.8°C) and 44.8°F (7.1°C). The start of June sees the average high-temperature at an agreeable 69.4°F (20.8°C), showing little difference from May's 64.8°F (18.2°C). Weather in June »
Weather in July
July is a warm summer month in Chehalis, Washington, with an average temperature fluctuating between 48.4°F (9.1°C) and 76.6°F (24.8°C). With the transition into July, Chehalis experiences a subtle uplift in average high-temperatures, adjusting from an agreeable 69.4°F (20.8°C) in June to a warm 76.6°F (24.8°C). Weather in July »
Weather in August
August, the last month of the summer in Chehalis, is also a moderately hot month, with an average temperature varying between 50°F (10°C) and 77.5°F (25.3°C). During the warmest month, August, temperatures average a high of 77.5°F (25.3°C) and a low of 50°F (10°C). Weather in August »
Weather in September
The first month of the autumn, September, is also an agreeable month in Chehalis, Washington, with temperature in the range of an average low of 46.9°F (8.3°C) and an average high of 70.3°F (21.3°C). September is marked by a subtle drop in average high-temperatures, transitioning from a warm 77.5°F (25.3°C) in August to a pleasant 70.3°F (21.3°C). Weather in September »
Weather in October
October, like September, is a moderate autumn month in Chehalis, Washington, with temperature in the range of an average high of 58.8°F (14.9°C) and an average low of 42.1°F (5.6°C). Chehalis's October weather shows a moderate shift in high-temperatures, falling from September's pleasant 70.3°F (21.3°C) to a mild 58.8°F (14.9°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Chehalis, Washington, with an average temperature fluctuating between 48.4°F (9.1°C) and 37.9°F (3.3°C). The transition into November is accompanied by a temperature decrease, with the average high-temperature shifting from a moderate 58.8°F (14.9°C) in October to a frosty 48.4°F (9.1°C). Weather in November »
Weather in December
December, the first month of the winter in Chehalis, is also a wintry month, with an average temperature ranging between max 42.6°F (5.9°C) and min 33.1°F (0.6°C). The coldest period tends to be December, when average temperatures fluctuate between a high of 42.6°F (5.9°C) and a low of 33.1°F (0.6°C). Weather in December »
[Resources]Frequently asked questions
What are the most humid months in Chehalis?
January, February, November and December, with an average relative humidity of 89%, are most humid months in Chehalis.
What is the wettest month in Chehalis?
January is the month with the most rainfall. Rain falls for 18.6 days and accumulates 5.51" (140mm) of precipitation.
How much does it rain in Chehalis?
Throughout the year, there are 185.5 rainfall days, and 36.1" (917mm) of precipitation is accumulated.
When does it snow in Chehalis?
January through March, November and December are months with snowfall.
How many days does it snow in Chehalis?
In Chehalis, Washington, during the entire year, snow falls for 9 days and aggregates up to 5.59" (142mm) of snow.
What is the month with the lowest UV index in Chehalis?
The months with the lowest UV index in Chehalis are January, February, November and December, with an average maximum UV index of 2.
When does it snow the most in Chehalis?
The month with the most snowfall is February, when snow falls for 3.5 days and typically aggregates up to 1.93" (49mm) of snow.
When is Daylight Saving Time (DST) in Chehalis?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Chehalis, Washington, 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.
When it does not snow in Chehalis?
April through October are months without snowfall in Chehalis.
When are the longest days in Chehalis?
With an average of 15h and 48min of daylight, June has the longest days of the year.
What is the least humid month in Chehalis?
With an average relative humidity of 73%, July is the least humid month.
What is the driest month in Chehalis?
July is the month with the least rainfall in Chehalis, Washington. Rain falls for 6.5 days and accumulates 0.47" (12mm) of precipitation.
What is the month with the highest UV index in Chehalis?
With an average maximum UV index of 5, July is the month with the highest UV index in Chehalis, Washington.
What part of the year is the hottest in Chehalis?
August tends to be the warmest month in Chehalis, with temperatures averaging a daily high of 77.5°F (25.3°C) and a low of 50°F (10°C).
What month has the most sunshine in Chehalis?
The month with the most sunshine is August, with an average of 10.2h of sunshine.
What part of the year is the coldest in Chehalis?
The coldest time of the year is December, with temperatures averaging a high of 42.6°F (5.9°C) and a low of 33.1°F (0.6°C).
What is the month with the shortest days in Chehalis?
With an average of 8h and 36min of daylight, December has the shortest days of the year.
What is the month with the least sunshine in Chehalis?
The month with the least sunshine in Chehalis is December, with an average of 3.5h of sunshine.
Average temperature
Chehalis, WA
The warmest month (with the highest average high temperature) is August (77.5°F).
The month with the lowest average high temperature is December (42.6°F).
The month with the highest average low temperature is August (50°F).
The coldest month (with the lowest average low temperature) is December (33.1°F).
Average pressure
Chehalis, WA
- Average pressure in January:
30.09"Hg - Average pressure in February:
30.06"Hg - Average pressure in March:
30.02"Hg - Average pressure in April:
30.06"Hg - Average pressure in May:
30.04"Hg - Average pressure in June:
30.04"Hg
- Average pressure in July:
30.06"Hg - Average pressure in August:
30.02"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.04"Hg - Average pressure in December:
30.08"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.02"Hg).
Average wind speed
Chehalis, WA
- Average wind speed in January:
4.5mph - Average wind speed in February:
4.3mph - Average wind speed in March:
4.5mph - Average wind speed in April:
4.3mph - Average wind speed in May:
4mph - Average wind speed in June:
4mph
- Average wind speed in July:
3.9mph - Average wind speed in August:
3.7mph - Average wind speed in September:
3.6mph - Average wind speed in October:
3.9mph - Average wind speed in November:
4.5mph - Average wind speed in December:
4.3mph
The windiest months (with the highest average wind speed) are January, March and November (4.5mph).
The calmest month (with the lowest average wind speed) is September (3.6mph).
Average humidity
Chehalis, WA
The months with the highest relative humidity are January, February, November and December (89%).
The month with the lowest relative humidity is July (73%).
Average rainfall
Chehalis, WA
- Average rainfall in January:
5.51" - Average rainfall in February:
3.7" - Average rainfall in March:
3.9" - Average rainfall in April:
2.91" - Average rainfall in May:
2.09" - Average rainfall in June:
1.5"
- Average rainfall in July:
0.47" - Average rainfall in August:
0.55" - Average rainfall in September:
1.65" - Average rainfall in October:
4.09" - Average rainfall in November:
4.37" - Average rainfall in December:
5.35"
The wettest month (with the highest rainfall) is January (5.51").
The driest month (with the least rainfall) is July (0.47").
Average rainfall days
Chehalis, WA
- Average rainfall days in January:
18.6 days - Average rainfall days in February:
18.1 days - Average rainfall days in March:
21.5 days - Average rainfall days in April:
19 days - Average rainfall days in May:
14.6 days - Average rainfall days in June:
12.6 days
- Average rainfall days in July:
6.5 days - Average rainfall days in August:
6.4 days - Average rainfall days in September:
11.3 days - Average rainfall days in October:
16.7 days - Average rainfall days in November:
20.2 days - Average rainfall days in December:
20 days
The month with the highest number of rainy days is March (21.5 days).
The month with the least rainy days is August (6.4 days).
Average snowfall
Chehalis, WA
The month with the highest snowfall is February (1.93").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Chehalis, WA
- Average snowfall days in January:
1.8 days - Average snowfall days in February:
3.5 days - Average snowfall days in March:
1.7 days - Average snowfall days in April:
0.1 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 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0.5 days - Average snowfall days in December:
1.4 days
The month with the highest number of snowfall days is February (3.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Chehalis, WA
- Average daylight in January:
9h and 1min - Average daylight in February:
10h and 2min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 4min - Average daylight in May:
15h and 1min - Average daylight in June:
15h and 5min
- Average daylight in July:
15h and 2min - Average daylight in August:
14h and 1min - Average daylight in September:
12h and 3min - Average daylight in October:
10h and 5min - Average daylight in November:
9h and 2min - Average daylight in December:
8h and 4min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in January:
3h and 4min - Average sunshine in February:
3h and 4min - Average sunshine in March:
5h and 0min - Average sunshine in April:
6h and 5min - Average sunshine in May:
8h and 0min - Average sunshine in June:
8h and 4min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
10h and 1min - Average sunshine in September:
8h and 2min - Average sunshine in October:
4h and 5min - Average sunshine in November:
3h and 5min - Average sunshine in December:
3h and 3min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 3h and 30min).
Average sunshine days
Chehalis, WA
- Average sunshine days in January:
9.6 days - Average sunshine days in February:
7.6 days - Average sunshine days in March:
8.2 days - Average sunshine days in April:
9.7 days - Average sunshine days in May:
15 days - Average sunshine days in June:
14.8 days
- Average sunshine days in July:
20.8 days - Average sunshine days in August:
20.8 days - Average sunshine days in September:
16.9 days - Average sunshine days in October:
12.9 days - Average sunshine days in November:
8.5 days - Average sunshine days in December:
9.5 days
The months with the most sunshine days are July and August (20.8 days).
The month with the least sunshine days is February (7.6 days).
Average UV index
Chehalis, WA
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Chehalis, WA
The months with the most cloud cover are January, February and December (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility
Chehalis, WA
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
Chehalis, Washington, USA
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