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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, the same as December, in Cosmopolis, Washington, is another chilly winter month, with an average temperature fluctuating between 37.2°F (2.9°C) and 46°F (7.8°C). The commencement of January brings an average high-temperature of a still chilly 46°F (7.8°C), marking an inconsequential divergence from December. Weather in January »
Weather in February
February, the last month of the winter in Cosmopolis, is also a frosty month, with temperature in the range of an average low of 36.7°F (2.6°C) and an average high of 46.8°F (8.2°C). The arrival of February brings an average high-temperature of a still frosty 46.8°F (8.2°C), subtly diverging from January's 46°F (7.8°C). Weather in February »
Weather in March
March, the first month of the spring in Cosmopolis, is a fresh month, with an average temperature varying between 37.8°F (3.2°C) and 50.4°F (10.2°C). March's onset sees an average high-temperature of a cool 50.4°F (10.2°C), exhibiting a slight fluctuation from the previous month. Weather in March »
Weather in April
April, the same as March, is a cool spring month in Cosmopolis, Washington, with an average temperature fluctuating between 54.3°F (12.4°C) and 39.7°F (4.3°C). Stepping into April, Cosmopolis records an average high-temperature of a still cool 54.3°F (12.4°C), almost consistent with March. Weather in April »
Weather in May
May, the last month of the spring in Cosmopolis, is a comfortable month, with an average temperature ranging between max 61.5°F (16.4°C) and min 43.9°F (6.6°C). A slight uplift in the average high-temperature marks May, adjusting from April's fresh 54.3°F (12.4°C) to a comfortable 61.5°F (16.4°C). Weather in May »
Weather in June
The first month of the summer, June, is still a refreshing month in Cosmopolis, Washington, with an average temperature ranging between max 64.9°F (18.3°C) and min 47.1°F (8.4°C). Cosmopolis, Washington, observes a minor difference in average high-temperatures between May's 61.5°F (16.4°C) and June's 64.9°F (18.3°C). Weather in June »
Weather in July
July is a pleasant summer month in Cosmopolis, Washington, with temperature in the range of an average high of 70.3°F (21.3°C) and an average low of 50.5°F (10.3°C). A slight uplift of average high-temperatures is noted in July, with temperatures adjusting from a comfortable 64.9°F (18.3°C) in June to a pleasant 70.3°F (21.3°C). Weather in July »
Weather in August
August, the last month of the summer in Cosmopolis, is another pleasant month, with temperature in the range of an average high of 71.4°F (21.9°C) and an average low of 51.1°F (10.6°C). With an average high-temperature of 71.4°F (21.9°C) and an average low-temperature of 51.1°F (10.6°C), August is the warmest month. Weather in August »
Weather in September
September, the first month of the autumn in Cosmopolis, is still a refreshing month, with an average temperature fluctuating between 67.8°F (19.9°C) and 49.5°F (9.7°C). The transition into September shows a subtle variation to a refreshing 67.8°F (19.9°C) from August's 71.4°F (21.9°C) in the average high-temperature. Weather in September »
Weather in October
October, like September, is another refreshing autumn month in Cosmopolis, Washington, with an average temperature ranging between max 58.5°F (14.7°C) and min 45.5°F (7.5°C). October implies a gentle temperature shift, with average high-temperatures reducing from September's refreshing 67.8°F (19.9°C) to a mild 58.5°F (14.7°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Cosmopolis, Washington, with an average temperature fluctuating between 49.8°F (9.9°C) and 41°F (5°C). The shift from October to November coincides with a small decrease in the average high-temperature, down to a chilly 49.8°F (9.9°C) from a mild 58.5°F (14.7°C). Weather in November »
Weather in December
December, the first month of the winter in Cosmopolis, is also a frosty month, with an average temperature fluctuating between 36.5°F (2.5°C) and 44.2°F (6.8°C). December is the coldest month, exhibiting average temperatures of 44.2°F (6.8°C) at the peak and 36.5°F (2.5°C) at the base. Weather in December »
Updated: Aug 21, 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
What is the rainiest month?
The month with the most rainfall is January, when the rain falls for 12.3 days and typically aggregates up to 1.93" (49mm) of precipitation.
How many days does it rain?
In Cosmopolis, during the entire year, the rain falls for 113.5 days and collects up to 10.24" (260mm) of precipitation.
When does it snow?
January through March are months with snowfall.
What is the snowiest month?
The months with the most snowfall are January and February, with an average 0.28" (7mm) of accumulated snow.
How many days does it snow?
Throughout the year, there are 3 snowfall days, and 0.71" (18mm) of snow is accumulated.
What is the month with the least sunshine?
January has the least sunshine of the year, with an average of 3.4h of sunshine.
What is the month with the lowest UV index?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
When is Daylight Saving Time (DST)?
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.
When it does not snow?
In Cosmopolis, snow does not fall in April through December.
When are the longest days in Cosmopolis?
With an average of 15h and 48min of daylight, June has the longest days of the year.
What is the least humid month?
With an average relative humidity of 78%, July is the least humid month.
What is the driest month?
July and August are months with the least rain when the rain falls for 4.5 days and typically aggregates up to 0.12" (3mm) of rain.
What month has the most sunshine?
July has the most sunshine of the year in Cosmopolis, with an average of 10.1h of sunshine.
When is the highest UV index?
July is the month with the highest UV index, with an average maximum UV index of 5.
What is the hottest time of year?
Cosmopolis witnesses the warmest weather in August, with temperatures averaging a high of 71.4°F (21.9°C) and a low of 51.1°F (10.6°C).
What are the most humid months?
November and December, with an average relative humidity of 88%, are most humid months.
What part of the year is the coldest?
The coldest time of the year is December, with temperatures averaging a high of 44.2°F (6.8°C) and a low of 36.5°F (2.5°C).
What is the month with the shortest days?
The month with the shortest days is December, with an average of 8h and 36min of daylight.
Average temperature
Cosmopolis, WA
The warmest month (with the highest average high temperature) is August (71.4°F).
The month with the lowest average high temperature is December (44.2°F).
The month with the highest average low temperature is August (51.1°F).
The coldest month (with the lowest average low temperature) is December (36.5°F).
Average pressure
Cosmopolis, WA
- Average pressure in January:
30.06"Hg - Average pressure in February:
30.04"Hg - Average pressure in March:
30.01"Hg - Average pressure in April:
30.06"Hg - Average pressure in May:
30.05"Hg - Average pressure in June:
30.06"Hg
- Average pressure in July:
30.08"Hg - Average pressure in August:
30.04"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.02"Hg - Average pressure in December:
30.05"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
Cosmopolis, WA
- Average wind speed in January:
7mph - Average wind speed in February:
6.5mph - Average wind speed in March:
6.3mph - Average wind speed in April:
6mph - Average wind speed in May:
5.6mph - Average wind speed in June:
5.8mph
- Average wind speed in July:
5.6mph - Average wind speed in August:
5mph - Average wind speed in September:
4.7mph - Average wind speed in October:
5.5mph - Average wind speed in November:
6.5mph - Average wind speed in December:
6.5mph
The windiest month (with the highest average wind speed) is January (7mph).
The calmest month (with the lowest average wind speed) is September (4.7mph).
Average humidity
Cosmopolis, WA
The months with the highest relative humidity are November and December (88%).
The month with the lowest relative humidity is July (78%).
Average rainfall
Cosmopolis, WA
- Average rainfall in January:
1.93" - Average rainfall in February:
1.02" - Average rainfall in March:
0.83" - Average rainfall in April:
0.63" - Average rainfall in May:
0.55" - Average rainfall in June:
0.39"
The wettest month (with the highest rainfall) is January (1.93").
The driest months (with the least rainfall) are July and August (0.12").
Average rainfall days
Cosmopolis, WA
- Average rainfall days in January:
12.3 days - Average rainfall days in February:
10.3 days - Average rainfall days in March:
13.6 days - Average rainfall days in April:
11.4 days - Average rainfall days in May:
9.4 days - Average rainfall days in June:
6.8 days
- Average rainfall days in July:
4.5 days - Average rainfall days in August:
3.2 days - Average rainfall days in September:
8.4 days - Average rainfall days in October:
9.6 days - Average rainfall days in November:
11.3 days - Average rainfall days in December:
12.7 days
The month with the highest number of rainy days is March (13.6 days).
The month with the least rainy days is August (3.2 days).
Average snowfall
Cosmopolis, WA
The months with the highest snowfall are January and February (0.28").
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0").
Average snowfall days
Cosmopolis, WA
- Average snowfall days in January:
0.9 days - Average snowfall days in February:
1.3 days - Average snowfall days in March:
0.6 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 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0.1 days - Average snowfall days in December:
0.1 days
The month with the highest number of snowfall days is February (1.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Cosmopolis, WA
- Average daylight in January:
9h and 0min - 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 2min - Average sunshine in February:
3h and 4min - Average sunshine in March:
5h and 2min - Average sunshine in April:
7h and 1min - Average sunshine in May:
8h and 1min - Average sunshine in June:
9h and 0min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
9h and 5min - Average sunshine in September:
8h and 1min - Average sunshine in October:
4h and 5min - Average sunshine in November:
4h and 0min - Average sunshine in December:
3h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days
Cosmopolis, WA
- Average sunshine days in January:
15.9 days - Average sunshine days in February:
14.1 days - Average sunshine days in March:
14.1 days - Average sunshine days in April:
14.5 days - Average sunshine days in May:
20 days - Average sunshine days in June:
19.8 days
- Average sunshine days in July:
24.9 days - Average sunshine days in August:
25.4 days - Average sunshine days in September:
20.2 days - Average sunshine days in October:
18.9 days - Average sunshine days in November:
17.3 days - Average sunshine days in December:
16.8 days
The month with the most sunshine days is August (25.4 days).
The months with the least sunshine days are February and March (14.1 days).
Average UV index
Cosmopolis, 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
Cosmopolis, WA
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is July (Cloud cover 37).
Average visibility
Cosmopolis, WA
The months with the highest visibility are February, March, April, May, June and November (5mi).
The months with the lowest visibility are January, July, August, September, October and December (4mi).
Cosmopolis, Washington, USA
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