Climate and monthly weather forecastSummit, WA
Climate and monthly weather forecast
Weather in January
January, like December, is a frosty winter month in Summit, Washington, with temperature in the range of an average high of 44.4°F (6.9°C) and an average low of 33.8°F (1°C). With the onset of January, the average high-temperature stands at a still chilly 44.4°F (6.9°C), closely aligned with December's 42.8°F (6°C). Weather in January »Weather in February
February, the last month of the winter in Summit, is also a frosty month, with temperature in the range of an average high of 45°F (7.2°C) and an average low of 33.1°F (0.6°C). In February, the average high-temperature registers at a still frosty 45°F (7.2°C), nearly identical to January's 44.4°F (6.9°C). Weather in February »Weather in March
March, the first month of the spring in Summit, is also a frosty month, with an average temperature ranging between max 49.8°F (9.9°C) and min 35.2°F (1.8°C). Summit's transition from February to March introduces an average high-temperature of a still chilly 49.8°F (9.9°C), marking an insignificant variation from the 45°F (7.2°C). Weather in March »Weather in April
April in Summit, Washington, is a fresh spring month, with temperature in the range of an average high of 55.2°F (12.9°C) and an average low of 38.3°F (3.5°C). April's onset brings a minor rise in the average high-temperature, moving from a frosty 49.8°F (9.9°C) in March to a cool 55.2°F (12.9°C). Weather in April »Weather in May
The last month of the spring, May, is a refreshing month in Summit, Washington, with temperature in the range of an average high of 63.7°F (17.6°C) and an average low of 43°F (6.1°C). The shift into May is accompanied by a modest temperature increase, with the average high-temperature edging up from a cool 55.2°F (12.9°C) in April to a refreshing 63.7°F (17.6°C). Weather in May »Weather in June
June, the first month of the summer in Summit, is an agreeable month, with an average temperature fluctuating between 68.5°F (20.3°C) and 46°F (7.8°C). In June, the average high-temperature registers at an agreeable 68.5°F (20.3°C), nearly identical to May's 63.7°F (17.6°C). Weather in June »Weather in July
July in Summit, Washington, is a moderately hot summer month, with an average temperature ranging between max 76.3°F (24.6°C) and min 50.2°F (10.1°C). Summit's transition into July is marked by a minor temperature shift, moving from an agreeable 68.5°F (20.3°C) in June to a moderately hot 76.3°F (24.6°C). Weather in July »Weather in August
August, the last month of the summer in Summit, is another warm month, with an average temperature varying between 51.6°F (10.9°C) and 76.5°F (24.7°C). Summit's August weather, marked by an average high temperature of 76.5°F (24.7°C) and an average low temperature of 51.6°F (10.9°C), is the warmest in the year. Weather in August »Weather in September
September, the first month of the autumn in Summit, is also an agreeable month, with an average temperature varying between 48.6°F (9.2°C) and 69.6°F (20.9°C). The arrival of September corresponds with a light shift in temperature, down from a warm 76.5°F (24.7°C) in August to a pleasant 69.6°F (20.9°C). Weather in September »Weather in October
October, like September, is another refreshing autumn month in Summit, Washington, with an average temperature ranging between max 58.3°F (14.6°C) and min 43.2°F (6.2°C). The onset of October entails a temperature shift, as the average high-temperature decreases from a pleasant 69.6°F (20.9°C) in September to a mild 58.3°F (14.6°C). Weather in October »Weather in November
November, the last month of the autumn in Summit, is also a frosty month, with an average temperature ranging between min 37.8°F (3.2°C) and max 48.6°F (9.2°C). The beginning of November involves a decrease in the average high-temperature, transitioning from a refreshing 58.3°F (14.6°C) in October to a frosty 48.6°F (9.2°C). Weather in November »Weather in December
The first month of the winter, December, is still a chilly month in Summit, Washington, with an average temperature fluctuating between 42.8°F (6°C) and 32.7°F (0.4°C). The coldest month is December, with an average high-temperature of 42.8°F (6°C) and an average low-temperature of 32.7°F (0.4°C). Weather in December »Updated: Feb 14, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
January is the most humid month in Summit, with an average relative humidity of 87%.
In Summit, Washington, during the entire year, the rain falls for 183.4 days and collects up to 32.48" (825mm) of precipitation.
Months with snowfall in Summit are January through March, November and December.
In Summit, during the entire year, snow falls for 7.4 days and aggregates up to 3.78" (96mm) of snow.
January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index.
The month with the most snowfall in Summit is February, when snow falls for 2.7 days and typically aggregates up to 1.42" (36mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Summit, 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.
In Summit, snow does not fall in April through October.
With an average of 15h and 54min of daylight, June has the longest days of the year.
The least humid month in Summit is July, with an average relative humidity of 69%.
July is the month with the least rainfall. Rain falls for 7 days and accumulates 0.43" (11mm) of precipitation.
With an average maximum UV index of 5, July is the month with the highest UV index.
August, having an average high-temperature of 76.5°F (24.7°C) and an average low-temperature of 51.6°F (10.9°C), is the warmest month in Summit, Washington.
August has the most sunshine of the year in Summit, with an average of 10.9h of sunshine.
In Summit, December records the average lowest temperatures, peaking at 42.8°F (6°C) and reaching a low of 32.7°F (0.4°C).
The month with the most rainfall is December, when the rain falls for 19.2 days and typically aggregates up to 4.92" (125mm) of precipitation.
The month with the shortest days is December, with an average of 8h and 36min of daylight.
December has the least sunshine of the year in Summit, with an average of 4.2h of sunshine.
Average temperature
Summit, WA
The warmest month (with the highest average high temperature) is August (76.5°F).
The month with the lowest average high temperature is December (42.8°F).
The month with the highest average low temperature is August (51.6°F).
The coldest month (with the lowest average low temperature) is December (32.7°F).
Average pressure
Summit, WA
- Average pressure in January:
30.1"Hg - Average pressure in February:
30.06"Hg - Average pressure in March:
30.01"Hg - Average pressure in April:
30.05"Hg - Average pressure in May:
30.02"Hg - Average pressure in June:
30.02"Hg
- Average pressure in July:
30.03"Hg - Average pressure in August:
30"Hg - Average pressure in September:
30.01"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.05"Hg - Average pressure in December:
30.09"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed
Summit, WA
- Average wind speed in January:
4.8mph - Average wind speed in February:
4.8mph - Average wind speed in March:
4.9mph - Average wind speed in April:
4.4mph - Average wind speed in May:
3.9mph - Average wind speed in June:
3.9mph
- Average wind speed in July:
3.7mph - Average wind speed in August:
3.5mph - Average wind speed in September:
3.7mph - Average wind speed in October:
4.2mph - Average wind speed in November:
4.7mph - Average wind speed in December:
4.5mph
The windiest month (with the highest average wind speed) is March (4.9mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).
Average humidity
Summit, WA
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is July (69%).
Average rainfall
Summit, WA
- Average rainfall in January:
4.8" - Average rainfall in February:
3.19" - Average rainfall in March:
3.43" - Average rainfall in April:
2.68" - Average rainfall in May:
1.73" - Average rainfall in June:
1.26"
- Average rainfall in July:
0.43" - Average rainfall in August:
0.59" - Average rainfall in September:
1.61" - Average rainfall in October:
3.74" - Average rainfall in November:
4.09" - Average rainfall in December:
4.92"
The wettest month (with the highest rainfall) is December (4.92").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days
Summit, WA
- Average rainfall days in January:
18.6 days - Average rainfall days in February:
18.5 days - Average rainfall days in March:
21 days - Average rainfall days in April:
18.4 days - Average rainfall days in May:
13.9 days - Average rainfall days in June:
13 days
- Average rainfall days in July:
7 days - Average rainfall days in August:
6.2 days - Average rainfall days in September:
12.1 days - Average rainfall days in October:
16.2 days - Average rainfall days in November:
19.3 days - Average rainfall days in December:
19.2 days
The month with the highest number of rainy days is March (21 days).
The month with the least rainy days is August (6.2 days).
Average snowfall
Summit, WA
The month with the highest snowfall is February (1.42").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Summit, WA
- Average snowfall days in January:
1.8 days - Average snowfall days in February:
2.7 days - Average snowfall days in March:
1.3 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 days
The month with the highest number of snowfall days is February (2.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Summit, WA
- Average daylight in January:
9h and 0min - Average daylight in February:
10h and 18min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 42min - Average daylight in May:
15h and 6min - 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 54min - Average daylight in November:
9h and 24min - Average daylight in December:
8h and 36min
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 36min).
- Average sunshine in January:
4h and 18min - Average sunshine in February:
4h and 30min - Average sunshine in March:
6h and 6min - Average sunshine in April:
8h and 0min - Average sunshine in May:
9h and 6min - Average sunshine in June:
9h and 30min
- Average sunshine in July:
10h and 42min - Average sunshine in August:
10h and 54min - Average sunshine in September:
9h and 18min - Average sunshine in October:
5h and 30min - Average sunshine in November:
4h and 42min - Average sunshine in December:
4h and 12min
The month with the most sunshine is August (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 4h and 12min).
Average sunshine days
Summit, WA
- Average sunshine days in January:
10.7 days - Average sunshine days in February:
8.2 days - Average sunshine days in March:
8.9 days - Average sunshine days in April:
9.3 days - Average sunshine days in May:
14.8 days - Average sunshine days in June:
14.3 days
- Average sunshine days in July:
22.2 days - Average sunshine days in August:
22.3 days - Average sunshine days in September:
16.7 days - Average sunshine days in October:
13.4 days - Average sunshine days in November:
9 days - Average sunshine days in December:
10 days
The month with the most sunshine days is August (22.3 days).
The month with the least sunshine days is February (8.2 days).
Average UV index
Summit, WA
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover
Summit, WA
The months with the most cloud cover are January and December (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility
Summit, WA
The months with the highest visibility are July and August (6mi).
The months with the lowest visibility are January, February, March, April, May, June, September, October, November and December (5mi).
