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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, is an icy winter month in Ahtanum, Washington, with an average temperature fluctuating between 26.6°F (-3°C) and 37.6°F (3.1°C). As December transitions into January, Ahtanum records an average high-temperature of a still wintry 37.6°F (3.1°C), showing a gentle shift from the preceding month. Weather in January »
Weather in February
February, the last month of the winter in Ahtanum, is also a wintry month, with temperature in the range of an average low of 28.9°F (-1.7°C) and an average high of 41.5°F (5.3°C). Ahtanum sees the arrival of February with an average high-temperature of a still icy 41.5°F (5.3°C), indicating a subtle variation from January. Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Ahtanum, Washington, with an average temperature ranging between max 49.5°F (9.7°C) and min 34.7°F (1.5°C). The shift from February to March is marked by a slight increase in the average high-temperature, moving from a wintry 41.5°F (5.3°C) to a frosty 49.5°F (9.7°C). Weather in March »
Weather in April
April is a mild spring month in Ahtanum, Washington, with an average temperature varying between 59.2°F (15.1°C) and 40.1°F (4.5°C). With the onset of April, Ahtanum sees a temperature rise, with the average high-temperature moving from March's chilly 49.5°F (9.7°C) to a mild 59.2°F (15.1°C). Weather in April »
Weather in May
The last month of the spring, May, is an agreeable month in Ahtanum, Washington, with an average temperature varying between 69.3°F (20.7°C) and 47.5°F (8.6°C). The commencement of May sees a shift in the average high-temperature, moving from a mild 59.2°F (15.1°C) in April to an agreeable 69.3°F (20.7°C). Weather in May »
Weather in June
June, the first month of the summer in Ahtanum, is a moderately hot month, with an average temperature ranging between min 52.3°F (11.3°C) and max 76.5°F (24.7°C). The coming of June brings a minor shift in Ahtanum's weather, with average high-temperatures adjusting from May's pleasant 69.3°F (20.7°C) to a moderately hot 76.5°F (24.7°C). Weather in June »
Weather in July
July is a hot summer month in Ahtanum, Washington, with temperature in the range of an average low of 59.2°F (15.1°C) and an average high of 86.2°F (30.1°C). Ahtanum's July weather shows an increase in high-temperatures, moving from June's warm 76.5°F (24.7°C) to a hot 86.2°F (30.1°C). Weather in July »
Weather in August
August, the last month of the summer in Ahtanum, is another hot month, with an average temperature fluctuating between 60.3°F (15.7°C) and 86.5°F (30.3°C). The warmest month is August, with an average high-temperature of 86.5°F (30.3°C) and an average low-temperature of 60.3°F (15.7°C). Weather in August »
Weather in September
September, the first month of the autumn in Ahtanum, is also a moderately hot month, with an average temperature ranging between max 74.8°F (23.8°C) and min 53.4°F (11.9°C). During Ahtanum's transition into September, the average high-temperature lessens, moving from a tropical 86.5°F (30.3°C) in August to a warm 74.8°F (23.8°C). Weather in September »
Weather in October
October, like September, is another refreshing autumn month in Ahtanum, Washington, with an average temperature ranging between max 60.1°F (15.6°C) and min 42.6°F (5.9°C). Ahtanum sees a considerable decrease in average high-temperatures during October, falling from a warm 74.8°F (23.8°C) in September to a refreshing 60.1°F (15.6°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Ahtanum, Washington, with an average temperature varying between 46.8°F (8.2°C) and 32.7°F (0.4°C). Ahtanum's progression into November involves a drop in the average high-temperature, receding from a refreshing 60.1°F (15.6°C) in October to a chilly 46.8°F (8.2°C). Weather in November »
Weather in December
December, the first month of the winter in Ahtanum, is also a wintry month, with temperature in the range of an average low of 25.5°F (-3.6°C) and an average high of 36.9°F (2.7°C). In Ahtanum, December is the month with the lowest recorded average temperatures, measuring a high of 36.9°F (2.7°C) and a low of 25.5°F (-3.6°C). Weather in December »
Updated: Jul 3, 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 most humid month?
With an average relative humidity of 81%, January is the most humid month in Ahtanum.
What is the wettest month?
The month with the most rainfall is January, when the rain falls for 10.3 days and typically aggregates up to 0.87" (22mm) of precipitation.
How many days does it rain?
Throughout the year, there are 82.2 rainfall days, and 5.43" (138mm) of precipitation is accumulated.
When does it snow?
January through March, September, November and December are months with snowfall in Ahtanum.
How many days does it snow?
Throughout the year, there are 18.5 snowfall days, and 7.8" (198mm) of snow is accumulated.
What is the month with the least sunshine?
January has the least sunshine of the year, with an average of 5.6h of sunshine.
What are the months 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?
April through August and October are months without snowfall.
When are the longest days?
With an average of 15h and 48min of daylight, June has the longest days of the year.
What are the least humid months?
The months with the lowest humidity in Ahtanum are July and August, with an average relative humidity of 39%.
What is the driest month?
The month with the least rainfall is July, when the rain falls for 2.1 days and typically collects 0.08" (2mm) of precipitation.
What are the months with the most sunshine?
July and August, with an average of 12.1h of sunshine, are months with the most sunshine.
When is the highest UV index?
With an average maximum UV index of 7, July is the month with the highest UV index.
What is the warmest month?
Temperature records mark August as the warmest month, with highs averaging 86.5°F (30.3°C) and lows at 60.3°F (15.7°C).
What are the coldest months?
The coldest period is December, when temperatures fluctuate between an average high of 36.9°F (2.7°C) and a low of 25.5°F (-3.6°C).
What is the snowiest month?
December is the month with the most snowfall. Snow falls for 5.4 days and accumulates 2.76" (70mm) of snow.
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
Ahtanum, WA
The warmest month (with the highest average high temperature) is August (86.5°F).
The month with the lowest average high temperature is December (36.9°F).
The month with the highest average low temperature is August (60.3°F).
The coldest month (with the lowest average low temperature) is December (25.5°F).
Average pressure
Ahtanum, WA
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.01"Hg - Average pressure in April:
30.01"Hg - Average pressure in May:
29.97"Hg - Average pressure in June:
29.96"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.93"Hg - Average pressure in September:
29.97"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.93"Hg).
Average wind speed
Ahtanum, WA
- Average wind speed in January:
4.5mph - Average wind speed in February:
4.9mph - Average wind speed in March:
5.9mph - Average wind speed in April:
6.8mph - Average wind speed in May:
6.8mph - Average wind speed in June:
7.1mph
- Average wind speed in July:
6.7mph - Average wind speed in August:
6.5mph - Average wind speed in September:
6mph - Average wind speed in October:
5.3mph - Average wind speed in November:
5mph - Average wind speed in December:
4.4mph
The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest month (with the lowest average wind speed) is December (4.4mph).
Average humidity
Ahtanum, WA
The month with the highest relative humidity is January (81%).
The months with the lowest relative humidity are July and August (39%).
Average rainfall
Ahtanum, WA
- Average rainfall in January:
0.87" - Average rainfall in February:
0.59" - Average rainfall in March:
0.63" - Average rainfall in April:
0.31" - Average rainfall in May:
0.63" - Average rainfall in June:
0.24"
- Average rainfall in July:
0.08" - Average rainfall in August:
0.16" - Average rainfall in September:
0.24" - Average rainfall in October:
0.43" - Average rainfall in November:
0.43" - Average rainfall in December:
0.83"
The wettest month (with the highest rainfall) is January (0.87").
The driest month (with the least rainfall) is July (0.08").
Average rainfall days
Ahtanum, WA
- Average rainfall days in January:
10.3 days - Average rainfall days in February:
7.8 days - Average rainfall days in March:
10.8 days - Average rainfall days in April:
7.8 days - Average rainfall days in May:
6.8 days - Average rainfall days in June:
4.8 days
- Average rainfall days in July:
2.1 days - Average rainfall days in August:
2 days - Average rainfall days in September:
3.9 days - Average rainfall days in October:
8 days - Average rainfall days in November:
8.8 days - Average rainfall days in December:
9.1 days
The month with the highest number of rainy days is March (10.8 days).
The month with the least rainy days is August (2 days).
Average snowfall
Ahtanum, WA
The month with the highest snowfall is December (2.76").
The months with the least snowfall are April, May, June, July, August and October (0").
Average snowfall days
Ahtanum, WA
- Average snowfall days in January:
4.5 days - Average snowfall days in February:
4.3 days - Average snowfall days in March:
2.1 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:
0.1 days - Average snowfall days in October:
0 days - Average snowfall days in November:
2 days - Average snowfall days in December:
5.4 days
The month with the highest number of snowfall days is December (5.4 days).
The months with the least snowfall days are May, June, July, August and October (0 days).
Average daylight / Average sunshine
Ahtanum, 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 0min - 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:
5h and 4min - Average sunshine in February:
6h and 1min - Average sunshine in March:
8h and 3min - Average sunshine in April:
11h and 0min - Average sunshine in May:
11h and 2min - Average sunshine in June:
11h and 5min
- Average sunshine in July:
12h and 1min - Average sunshine in August:
12h and 1min - Average sunshine in September:
11h and 1min - Average sunshine in October:
7h and 1min - Average sunshine in November:
6h and 5min - Average sunshine in December:
5h and 5min
The months with the most sunshine are July and August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).
Average sunshine days
Ahtanum, WA
- Average sunshine days in January:
17 days - Average sunshine days in February:
15.8 days - Average sunshine days in March:
16.4 days - Average sunshine days in April:
18.8 days - Average sunshine days in May:
21.2 days - Average sunshine days in June:
23 days
- Average sunshine days in July:
27.5 days - Average sunshine days in August:
27.4 days - Average sunshine days in September:
23.8 days - Average sunshine days in October:
20 days - Average sunshine days in November:
17.9 days - Average sunshine days in December:
17.3 days
The month with the most sunshine days is July (27.5 days).
The month with the least sunshine days is February (15.8 days).
Average UV index
Ahtanum, WA
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Ahtanum, WA
The month with the most cloud cover is January (Cloud cover 40).
The months with the least cloud cover are July and August (Cloud cover 9).
Average visibility
Ahtanum, WA
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Ahtanum, Washington, USA
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