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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, like December, is another subzero cold winter month in Keller, Washington, with an average temperature ranging between max 30.6°F (-0.8°C) and min 18.5°F (-7.5°C). The ushering in of January brings an average high-temperature of a still freezing cold 30.6°F (-0.8°C), closely mirroring the 29.7°F (-1.3°C) of December. Weather in January »
Weather in February
February, the last month of the winter in Keller, is an icy month, with temperature in the range of an average high of 33.4°F (0.8°C) and an average low of 18.3°F (-7.6°C). Keller signifies an average high-temperature of a cold 33.4°F (0.8°C) in February, closely mirroring the 30.6°F (-0.8°C) of January. Weather in February »
Weather in March
The first month of the spring, March, is also an icy month in Keller, Washington, with temperature in the range of an average high of 42.3°F (5.7°C) and an average low of 26.4°F (-3.1°C). Keller, Washington, observes a slight ascent in average high-temperatures during March, adjusting from a cold 33.4°F (0.8°C) in February to a still wintry 42.3°F (5.7°C). Weather in March »
Weather in April
April is a cool spring month in Keller, Washington, with temperature in the range of an average high of 53.2°F (11.8°C) and an average low of 31.5°F (-0.3°C). With the arrival of April, the average high-temperature transitions from a cold 42.3°F (5.7°C) in March to a fresh 53.2°F (11.8°C). Weather in April »
Weather in May
May, the last month of the spring in Keller, is an enjoyable month, with an average temperature fluctuating between 39.4°F (4.1°C) and 65.1°F (18.4°C). The onset of May marks an increase in the average high-temperature, moving from a fresh 53.2°F (11.8°C) in April to a comfortable 65.1°F (18.4°C). Weather in May »
Weather in June
June, the first month of the summer in Keller, is an agreeable month, with an average temperature fluctuating between 44.2°F (6.8°C) and 71.1°F (21.7°C). June signifies a subtle uplift in the average high-temperature, adjusting from a comfortable 65.1°F (18.4°C) in May to an agreeable 71.1°F (21.7°C). Weather in June »
Weather in July
July in Keller, Washington, is a warm summer month, with an average temperature fluctuating between 50.7°F (10.4°C) and 82.4°F (28°C). Keller sees an increase in average high-temperatures during July, moving from an agreeable 71.1°F (21.7°C) in June to a warm 82.4°F (28°C). Weather in July »
Weather in August
August, the last month of the summer in Keller, is also a moderately hot month, with temperature in the range of an average high of 82.8°F (28.2°C) and an average low of 52.3°F (11.3°C). In Keller, the peak average temperatures are observed in August, with a high of 82.8°F (28.2°C) and a low of 52.3°F (11.3°C). For most parts of August, the heat index is appraised at 82.4°F (28°C). Weather in August »
Weather in September
September, the first month of the autumn in Keller, is also an agreeable month, with an average temperature varying between 71.6°F (22°C) and 44.8°F (7.1°C). September's onset brings a reduction in the average high-temperature, from a warm 82.8°F (28.2°C) in August to a pleasant 71.6°F (22°C). Weather in September »
Weather in October
October, the same as September, is a cool autumn month in Keller, Washington, with temperature in the range of an average high of 54.1°F (12.3°C) and an average low of 35.4°F (1.9°C). As Keller transitions into October, the average high-temperature shows a marked reduction, decreasing from a pleasant 71.6°F (22°C) in September to a cool 54.1°F (12.3°C). Weather in October »
Weather in November
November, the last month of the autumn in Keller, is also a wintry month, with an average temperature ranging between max 39°F (3.9°C) and min 26.8°F (-2.9°C). With the onset of November, Keller experiences a distinct temperature drop, with the average high-temperature reducing from October's cool 54.1°F (12.3°C) to an icy 39°F (3.9°C). Weather in November »
Weather in December
December, the first month of the winter in Keller, is also a subzero cold month, with an average temperature fluctuating between 29.7°F (-1.3°C) and 18.3°F (-7.6°C). December, recording an average high temperature of 29.7°F (-1.3°C) and a low temperature of 18.3°F (-7.6°C), is Keller's coldest month. Weather in December »
Updated: Jun 6, 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?
January is the most humid month, with an average relative humidity of 94%.
How much does it rain?
In Keller, during the entire year, the rain falls for 86.6 days and collects up to 6.38" (162mm) of precipitation.
When does it snow?
Months with snowfall are January through April, September, November and December.
When does it snow the most?
The month with the most snowfall is January, when snow falls for 5.3 days and typically aggregates up to 1.42" (36mm) of snow.
How much does it snow?
In Keller, during the entire year, snow falls for 24.6 days and aggregates up to 6.34" (161mm) of snow.
What is the month with the least sunshine?
With an average of 3.7h of sunshine, January has the least sunshine of the year.
What are the months with the lowest UV index?
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 1.
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.
What is the wettest month?
The month with the most rainfall is May, when the rain falls for 11.3 days and typically aggregates up to 1.06" (27mm) of precipitation.
When it does not snow?
May through August and October are months without snowfall.
When are the longest days?
June has the longest days of the year, with an average of 16h and 0min of daylight.
When is the highest UV index?
The month with the highest UV index is July, with an average maximum UV index of 6.
What month is the hottest?
Keller's warmest month, August, generally records average temperatures ranging from a high of 82.8°F (28.2°C) to a low of 52.3°F (11.3°C).
What is the least humid month?
The least humid month is August, with an average relative humidity of 47%.
What is the driest month?
August is the month with the least rainfall. Rain falls for 5.3 days and accumulates 0.31" (8mm) of precipitation.
What month has the most sunshine?
The month with the most sunshine is August, with an average of 12.1h of sunshine.
What are the coldest months?
December, characterized by an average high temperature of 29.7°F (-1.3°C) and a low temperature of 18.3°F (-7.6°C), is generally the coldest month in Keller.
What is the month with the shortest days?
With an average of 8h and 24min of daylight, December has the shortest days of the year in Keller.
Average temperature
Keller, WA
The warmest month (with the highest average high temperature) is August (82.8°F).
The month with the lowest average high temperature is December (29.7°F).
The month with the highest average low temperature is August (52.3°F).
The coldest months (with the lowest average low temperature) are February and December (18.3°F).
Average pressure
Keller, WA
- Average pressure in January:
30.19"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.02"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
29.94"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.93"Hg - Average pressure in August:
29.91"Hg - Average pressure in September:
29.97"Hg - Average pressure in October:
30.05"Hg - Average pressure in November:
30.1"Hg - Average pressure in December:
30.17"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).
Average wind speed
Keller, WA
- Average wind speed in January:
3.4mph - Average wind speed in February:
3.5mph - Average wind speed in March:
4.3mph - Average wind speed in April:
4.6mph - Average wind speed in May:
4.3mph - Average wind speed in June:
4.2mph
- Average wind speed in July:
4mph - Average wind speed in August:
3.9mph - Average wind speed in September:
3.9mph - Average wind speed in October:
3.9mph - Average wind speed in November:
3.8mph - Average wind speed in December:
3.4mph
The windiest month (with the highest average wind speed) is April (4.6mph).
The calmest months (with the lowest average wind speed) are January and December (3.4mph).
Average humidity
Keller, WA
The month with the highest relative humidity is January (94%).
The month with the lowest relative humidity is August (47%).
Average rainfall
Keller, WA
- Average rainfall in January:
0.51" - Average rainfall in February:
0.35" - Average rainfall in March:
0.63" - Average rainfall in April:
0.43" - Average rainfall in May:
1.06" - Average rainfall in June:
0.91"
- Average rainfall in July:
0.43" - Average rainfall in August:
0.31" - Average rainfall in September:
0.51" - Average rainfall in October:
0.35" - Average rainfall in November:
0.43" - Average rainfall in December:
0.43"
The wettest month (with the highest rainfall) is May (1.06").
The driest month (with the least rainfall) is August (0.31").
Average rainfall days
Keller, WA
- Average rainfall days in January:
6.3 days - Average rainfall days in February:
5 days - Average rainfall days in March:
9 days - Average rainfall days in April:
9.9 days - Average rainfall days in May:
11.3 days - Average rainfall days in June:
10.8 days
- Average rainfall days in July:
6.3 days - Average rainfall days in August:
5.3 days - Average rainfall days in September:
5 days - Average rainfall days in October:
6.5 days - Average rainfall days in November:
6 days - Average rainfall days in December:
5.2 days
The month with the highest number of rainy days is May (11.3 days).
The months with the least rainy days are February and September (5 days).
Average snowfall
Keller, WA
The month with the highest snowfall is January (1.42").
The months with the least snowfall are May, June, July, August and October (0").
Average snowfall days
Keller, WA
- Average snowfall days in January:
5.3 days - Average snowfall days in February:
5.3 days - Average snowfall days in March:
2.7 days - Average snowfall days in April:
0.5 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:
0.2 days - Average snowfall days in October:
0.3 days - Average snowfall days in November:
2.8 days - Average snowfall days in December:
7.5 days
The month with the highest number of snowfall days is December (7.5 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight / Average sunshine
Keller, WA
- Average daylight in January:
8h and 5min - Average daylight in February:
10h and 2min - Average daylight in March:
11h and 5min - Average daylight in April:
13h and 4min - Average daylight in May:
15h and 1min - Average daylight in June:
16h and 0min
- Average daylight in July:
15h and 4min - Average daylight in August:
14h and 1min - Average daylight in September:
12h and 4min - Average daylight in October:
10h and 5min - Average daylight in November:
9h and 2min - Average daylight in December:
8h and 2min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in January:
3h and 4min - Average sunshine in February:
4h and 0min - Average sunshine in March:
6h and 1min - Average sunshine in April:
9h and 4min - Average sunshine in May:
10h and 4min - Average sunshine in June:
10h and 5min
- Average sunshine in July:
11h and 5min - Average sunshine in August:
12h and 1min - Average sunshine in September:
10h and 2min - Average sunshine in October:
6h and 2min - Average sunshine in November:
4h and 5min - Average sunshine in December:
4h and 0min
The month with the most sunshine is August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Keller, WA
- Average sunshine days in January:
22.2 days - Average sunshine days in February:
19.3 days - Average sunshine days in March:
19.4 days - Average sunshine days in April:
18.4 days - Average sunshine days in May:
17.8 days - Average sunshine days in June:
17.3 days
- Average sunshine days in July:
22.2 days - Average sunshine days in August:
22.8 days - Average sunshine days in September:
23.8 days - Average sunshine days in October:
23.5 days - Average sunshine days in November:
21.5 days - Average sunshine days in December:
21.5 days
The month with the most sunshine days is September (23.8 days).
The month with the least sunshine days is June (17.3 days).
Average UV index
Keller, WA
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover
Keller, WA
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility
Keller, WA
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The month with the lowest visibility is January (2mi).
Keller, Washington, USA
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