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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 a wintry winter month in Union Gap, Washington, with an average temperature varying between 37.6°F (3.1°C) and 26.6°F (-3°C). The average high-temperature is a still wintry 37.6°F (3.1°C) in January, hardly different from the 36.9°F (2.7°C) recorded in December. Weather in January »
Weather in February
The last month of the winter, February, is another cold month in Union Gap, Washington, with an average temperature ranging between max 41.5°F (5.3°C) and min 28.9°F (-1.7°C). The onset of February brings with it an average high-temperature of a still cold 41.5°F (5.3°C), showing a negligible variation from the month before. Weather in February »
Weather in March
March, the first month of the spring in Union Gap, is a frosty month, with temperature in the range of an average high of 49.5°F (9.7°C) and an average low of 34.7°F (1.5°C). The start of March signals a slight increase in the average high-temperature, moving from a cold 41.5°F (5.3°C) in February to a frosty 49.5°F (9.7°C). Weather in March »
Weather in April
April is a mild spring month in Union Gap, Washington, with temperature in the range of an average high of 59.2°F (15.1°C) and an average low of 40.1°F (4.5°C). With the onset of April, Union Gap's average high-temperature sees a rise, moving from March's frosty 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 a pleasant month in Union Gap, Washington, with an average temperature fluctuating between 47.5°F (8.6°C) and 69.3°F (20.7°C). May comes with an increase, with the average high-temperature moving from a moderate 59.2°F (15.1°C) in April to a pleasant 69.3°F (20.7°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Union Gap, Washington, with an average temperature fluctuating between 76.5°F (24.7°C) and 52.3°F (11.3°C). The arrival of June introduces a minor uplift in high-temperatures, adjusting from an agreeable 69.3°F (20.7°C) in May to a moderately hot 76.5°F (24.7°C). Weather in June »
Weather in July
July in Union Gap, Washington, is a tropical summer month, with an average temperature ranging between min 59.2°F (15.1°C) and max 86.2°F (30.1°C). July's arrival sees a rise in the average high-temperature, jumping from June's warm 76.5°F (24.7°C) to a tropical 86.2°F (30.1°C). Weather in July »
Weather in August
The last month of the summer, August, is another hot month in Union Gap, Washington, with an average temperature varying between 86.5°F (30.3°C) and 60.3°F (15.7°C). In Union Gap, the peak temperatures are generally noted in August, averaging a high of 86.5°F (30.3°C) and a low of 60.3°F (15.7°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Union Gap, Washington, with an average temperature ranging between min 53.4°F (11.9°C) and max 74.8°F (23.8°C). In September, the average high-temperature goes from a hot 86.5°F (30.3°C) in August to a moderately hot 74.8°F (23.8°C). Weather in September »
Weather in October
October, like September, is another mild autumn month in Union Gap, Washington, with an average temperature ranging between max 60.1°F (15.6°C) and min 42.6°F (5.9°C). Union Gap's transition into October marks a considerable drop in the average high-temperature, moving down from a warm 74.8°F (23.8°C) in September to a moderate 60.1°F (15.6°C). Weather in October »
Weather in November
November, the last month of the autumn in Union Gap, is another chilly month, with an average temperature fluctuating between 32.7°F (0.4°C) and 46.8°F (8.2°C). As October transitions to November, the average high-temperature falls from a mild 60.1°F (15.6°C) to a chilly 46.8°F (8.2°C). Weather in November »
Weather in December
The first month of the winter, December, is also a wintry month in Union Gap, Washington, with an average temperature fluctuating between 36.9°F (2.7°C) and 25.5°F (-3.6°C). In Union Gap, Washington, the lowest average temperatures are observed in December, with a high of 36.9°F (2.7°C) and a low of 25.5°F (-3.6°C). Weather in December »
Updated: Jul 18, 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?
The most humid month is January, with an average relative humidity of 81%.
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 in Union Gap?
In Union Gap, during the entire year, the rain falls for 82.2 days and collects up to 5.43" (138mm) of precipitation.
When does it snow?
January through March, September, November and December are months with snowfall.
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?
With an average of 5.6h of sunshine, January has the least sunshine of the year.
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 in Union Gap.
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 in Union Gap.
What are the least humid months?
The months with the lowest humidity are July and August, with an average relative humidity of 39%.
What is the driest month?
July is the month with the least rainfall. Rain falls for 2.1 days and accumulates 0.08" (2mm) of precipitation.
What is the month with the most sunshine?
The months with the most sunshine are July and August, with an average of 12.1h of sunshine.
When is the highest UV index?
With an average maximum UV index of 7, July is the month with the highest UV index in Union Gap.
What part of the year is the hottest?
In Union Gap, August registers the highest temperatures, averaging 86.5°F (30.3°C) at the peak and 60.3°F (15.7°C) at the lowest.
What month is the coldest?
Union Gap experiences its average lowest temperatures in December, reaching a peak of 36.9°F (2.7°C) and a minimum of 25.5°F (-3.6°C).
What is the snowiest month?
The month with the most snowfall is December, when snow falls for 5.4 days and typically aggregates up to 2.76" (70mm) of snow.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 8h and 36min of daylight.
Average temperature
Union Gap, 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
Union Gap, 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
Union Gap, 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
Union Gap, 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
Union Gap, 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
Union Gap, 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
Union Gap, 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
Union Gap, 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
Union Gap, 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
Union Gap, 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
Union Gap, 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
Union Gap, 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
Union Gap, 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).
Union Gap, Washington, USA
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