Climate and monthly weather forecastCoulee City, WA
Climate and monthly weather forecast
Weather in January
January in Coulee City, Washington, is a cold winter month, with an average temperature ranging between min 21.9°F (-5.6°C) and max 32°F (0°C). Coulee City's weather, upon January's arrival, documents an average high-temperature of a wintry 32°F (0°C), nearly identical to the prior month. Weather in January »Weather in February
February, the last month of the winter in Coulee City, is another cold month, with an average temperature varying between 35.6°F (2°C) and 24.1°F (-4.4°C). The onset of February notes an average high-temperature of a still cold 35.6°F (2°C), subtly shifted from January's 32°F (0°C). Weather in February »Weather in March
The first month of the spring, March, is a chilly month in Coulee City, Washington, with an average temperature fluctuating between 46°F (7.8°C) and 32°F (0°C). March brings an increase in the average high-temperature, progressing from an icy 35.6°F (2°C) in February to a chilly 46°F (7.8°C). Weather in March »Weather in April
April in Coulee City, Washington, is a mild spring month, with an average temperature ranging between min 37.9°F (3.3°C) and max 57°F (13.9°C). The start of April signals an increase in the average high-temperature, moving from a chilly 46°F (7.8°C) in March to a moderate 57°F (13.9°C). Weather in April »Weather in May
May, the last month of the spring in Coulee City, is a comfortable month, with temperature in the range of an average high of 67.6°F (19.8°C) and an average low of 46°F (7.8°C). The onset of May marks an increase in the average high-temperature, moving from a mild 57°F (13.9°C) in April to an enjoyable 67.6°F (19.8°C). Weather in May »Weather in June
The first month of the summer, June, is a moderately hot month in Coulee City, Washington, with an average temperature fluctuating between 51.8°F (11°C) and 74.3°F (23.5°C). The onset of June brings a minor temperature shift, with the average high-temperature moving from a comfortable 67.6°F (19.8°C) in May to a moderately hot 74.3°F (23.5°C). Weather in June »Weather in July
July, like June, in Coulee City, Washington, is a moderately hot summer month, with an average temperature varying between 84.9°F (29.4°C) and 59.7°F (15.4°C). In Coulee City, the peak average temperatures are observed in July, with a high of 84.9°F (29.4°C) and a low of 59.7°F (15.4°C). Weather in July »Weather in August
August, the last month of the summer in Coulee City, is also a moderately hot month, with an average temperature varying between 61.3°F (16.3°C) and 84.2°F (29°C). With the arrival of August, Coulee City's average high-temperature registers at a still warm 84.2°F (29°C), indicating a subtle variation from the previous month. Weather in August »Weather in September
September, the first month of the autumn in Coulee City, is still a pleasant month, with temperature in the range of an average high of 72.7°F (22.6°C) and an average low of 53.2°F (11.8°C). The transition into September indicates a reduction in the average high-temperature, down to a pleasant 72.7°F (22.6°C) from August's moderately hot 84.2°F (29°C). Weather in September »Weather in October
October, the same as September, in Coulee City, Washington, is a moderate autumn month, with an average temperature varying between 41.4°F (5.2°C) and 56.3°F (13.5°C). The start of October brings a distinct shift in the average high-temperature, dropping from September's agreeable 72.7°F (22.6°C) to a mild 56.3°F (13.5°C). Weather in October »Weather in November
November, the last month of the autumn in Coulee City, is also an icy month, with an average temperature ranging between max 41.4°F (5.2°C) and min 30.7°F (-0.7°C). November's arrival brings a noticeable temperature shift, dropping from a moderate 56.3°F (13.5°C) in October to a wintry 41.4°F (5.2°C). Weather in November »Weather in December
The first month of the winter, December, is also a subzero cold month in Coulee City, Washington, with an average temperature ranging between max 31.6°F (-0.2°C) and min 21.4°F (-5.9°C). December brings the lowest temperatures, with an average high of 31.6°F (-0.2°C) and an average low of 21.4°F (-5.9°C). 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
January is the most humid month, with an average relative humidity of 89%.
Throughout the year, there are 102.1 rainfall days, and 9.65" (245mm) of precipitation is accumulated.
Months with snowfall are January through April, September through December.
The month with the most snowfall is January, when snow falls for 8.4 days and typically aggregates up to 4.41" (112mm) of snow.
In Coulee City, during the entire year, snow falls for 33.4 days and aggregates up to 14.65" (372mm) of snow.
With an average of 4.1h of sunshine, January has the least sunshine of the year.
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 wettest months in Coulee City are May and December, with an average 1.18" (30mm) of rainfall.
In Coulee City, snow does not fall in May through August.
With an average of 15h and 54min of daylight, June has the longest days of the year.
The warmest period is July, when temperatures fluctuate between an average high of 84.9°F (29.4°C) and a low of 59.7°F (15.4°C).
The months with the least rainfall are July and August Rain falls for 4.2 days and accumulates 0.2" (5mm) of rain.
With an average maximum UV index of 7, July is the month with the highest UV index.
With an average relative humidity of 36%, August is the least humid month.
August has the most sunshine of the year, with an average of 12.1h of sunshine.
November is the month with the lowest UV index, with an average maximum UV index of 1.
In Coulee City, December is known for its average lowest temperatures, reaching a high of 31.6°F (-0.2°C) and a low of 21.4°F (-5.9°C).
With an average of 8h and 30min of daylight, December has the shortest days of the year.
Average temperature
Coulee City, WA
The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is December (31.6°F).
The month with the highest average low temperature is August (61.3°F).
The coldest month (with the lowest average low temperature) is December (21.4°F).
Average pressure
Coulee City, WA
- Average pressure in January:
30.18"Hg - Average pressure in February:
30.1"Hg - Average pressure in March:
30.01"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
29.94"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.93"Hg - Average pressure in August:
29.91"Hg - Average pressure in September:
29.96"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.08"Hg - Average pressure in December:
30.15"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed
Coulee City, WA
- Average wind speed in January:
4.9mph - Average wind speed in February:
5.3mph - Average wind speed in March:
6.3mph - Average wind speed in April:
7mph - Average wind speed in May:
6.3mph - Average wind speed in June:
6.3mph
- Average wind speed in July:
6mph - Average wind speed in August:
5.7mph - Average wind speed in September:
5.8mph - Average wind speed in October:
5.9mph - Average wind speed in November:
5.8mph - Average wind speed in December:
5mph
The windiest month (with the highest average wind speed) is April (7mph).
The calmest month (with the lowest average wind speed) is January (4.9mph).
Average humidity
Coulee City, WA
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (36%).
Average rainfall
Coulee City, WA
- Average rainfall in January:
1.14" - Average rainfall in February:
0.75" - Average rainfall in March:
1.06" - Average rainfall in April:
0.79" - Average rainfall in May:
1.18" - Average rainfall in June:
0.75"
The wettest months (with the highest rainfall) are May and December (1.18").
The driest months (with the least rainfall) are July and August (0.2").
Average rainfall days
Coulee City, WA
- Average rainfall days in January:
9.7 days - Average rainfall days in February:
7.8 days - Average rainfall days in March:
12.1 days - Average rainfall days in April:
11.1 days - Average rainfall days in May:
10.8 days - Average rainfall days in June:
8.4 days
- Average rainfall days in July:
4.2 days - Average rainfall days in August:
3.2 days - Average rainfall days in September:
5.5 days - Average rainfall days in October:
10.3 days - Average rainfall days in November:
10.5 days - Average rainfall days in December:
8.5 days
The month with the highest number of rainy days is March (12.1 days).
The month with the least rainy days is August (3.2 days).
Average snowfall
Coulee City, WA
The month with the highest snowfall is January (4.41").
The months with the least snowfall are May, June, July and August (0").
Average snowfall days
Coulee City, WA
- Average snowfall days in January:
8.4 days - Average snowfall days in February:
6.9 days - Average snowfall days in March:
3.2 days - Average snowfall days in April:
0.8 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:
0.2 days - Average snowfall days in November:
3.3 days - Average snowfall days in December:
10.5 days
The month with the highest number of snowfall days is December (10.5 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight / Average sunshine
Coulee City, WA
- Average daylight in January:
9h and 0min - Average daylight in February:
10h and 18min - Average daylight in March:
11h and 54min - Average daylight in April:
13h and 42min - Average daylight in May:
15h and 12min - Average daylight in June:
15h and 54min
- Average daylight in July:
15h and 30min - Average daylight in August:
14h and 12min - Average daylight in September:
12h and 30min - Average daylight in October:
10h and 48min - Average daylight in November:
9h and 18min - Average daylight in December:
8h and 30min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in January:
4h and 6min - Average sunshine in February:
4h and 48min - Average sunshine in March:
7h and 18min - Average sunshine in April:
10h and 6min - Average sunshine in May:
10h and 54min - Average sunshine in June:
11h and 18min
- Average sunshine in July:
11h and 54min - Average sunshine in August:
12h and 6min - Average sunshine in September:
10h and 42min - Average sunshine in October:
6h and 42min - Average sunshine in November:
5h and 30min - Average sunshine in December:
4h and 24min
The month with the most sunshine is August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days
Coulee City, WA
- Average sunshine days in January:
16 days - Average sunshine days in February:
14.8 days - Average sunshine days in March:
14.7 days - Average sunshine days in April:
15.8 days - Average sunshine days in May:
18 days - Average sunshine days in June:
19.9 days
- Average sunshine days in July:
25.5 days - Average sunshine days in August:
25.8 days - Average sunshine days in September:
23.3 days - Average sunshine days in October:
19.2 days - Average sunshine days in November:
15.4 days - Average sunshine days in December:
16 days
The month with the most sunshine days is August (25.8 days).
The month with the least sunshine days is March (14.7 days).
Average UV index
Coulee City, WA
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is November (UV index 1).
Average cloud cover
Coulee City, WA
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility
Coulee City, WA
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and December (4mi).
