Climate and monthly weather forecast
Union Gap, WA

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Weather in January

January, the same as December, is a wintry winter month in Union Gap, Washington, with an average temperature ranging between max 37.6°F (3.1°C) and min 26.6°F (-3°C). Welcoming January, Union Gap notes an average high-temperature of a still icy 37.6°F (3.1°C), nearly consistent with December's 36.9°F (2.7°C). Weather in January »

Weather in February

February, the last month of the winter in Union Gap, is another cold month, with temperature in the range of an average high of 41.5°F (5.3°C) and an average low of 28.9°F (-1.7°C). Union Gap's February average high-temperature settles at a still icy 41.5°F (5.3°C), showing a near match with the preceding month. Weather in February »

Weather in March

March, the first month of the spring in Union Gap, is a chilly month, with an average temperature ranging between min 34.7°F (1.5°C) and max 49.5°F (9.7°C). The coming of March brings a minor shift in Union Gap's weather, with average high-temperatures adjusting from February's cold 41.5°F (5.3°C) to a chilly 49.5°F (9.7°C). Weather in March »

Weather in April

April is a refreshing spring month in Union Gap, Washington, with an average temperature varying between 40.1°F (4.5°C) and 59.2°F (15.1°C). An increase in the average high-temperature marks April, 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 Union Gap, Washington, with an average temperature varying between 69.3°F (20.7°C) and 47.5°F (8.6°C). Union Gap, Washington, sees a rise in temperature during May, with average high-temperatures transitioning from a moderate 59.2°F (15.1°C) in April to an agreeable 69.3°F (20.7°C). Weather in May »

Weather in June

The first month of the summer, June, is a warm month in Union Gap, Washington, with an average temperature ranging between min 52.3°F (11.3°C) and max 76.5°F (24.7°C). June's onset brings a minor rise in the average high-temperature, moving from a pleasant 69.3°F (20.7°C) in May to a warm 76.5°F (24.7°C). Weather in June »

Weather in July

July in Union Gap, Washington, is a hot summer month, with an average temperature varying between 59.2°F (15.1°C) and 86.2°F (30.1°C). The shift into July is marked by a rise in the average high-temperature, moving 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 tropical month in Union Gap, Washington, with temperature in the range of an average high of 86.5°F (30.3°C) and an average low of 60.3°F (15.7°C). In Union Gap, August is the warmest month, with temperatures 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). A shift in the average high-temperature occurs in September, reducing from a tropical 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 refreshing autumn month in Union Gap, Washington, with temperature in the range of an average high of 60.1°F (15.6°C) and an average low of 42.6°F (5.9°C). October's arrival is marked by a significant decrease in the average high-temperature, moving from a moderately hot 74.8°F (23.8°C) in September to a mild 60.1°F (15.6°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a frosty month in Union Gap, Washington, with an average temperature ranging between max 46.8°F (8.2°C) and min 32.7°F (0.4°C). As November arrives, Union Gap's weather displays a decrease in high-temperatures, transitioning from October's refreshing 60.1°F (15.6°C) to a chilly 46.8°F (8.2°C). Weather in November »

Weather in December

December, the first month of the winter in Union Gap, is also a wintry month, with an average temperature fluctuating between 36.9°F (2.7°C) and 25.5°F (-3.6°C). The lowest temperatures are recorded in December, with averages reaching a high of 36.9°F (2.7°C) and a low of 25.5°F (-3.6°C). Weather in December »
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Frequently asked questions

What is the most humid month in Union Gap?

With an average relative humidity of 81%, January is the most humid month in Union Gap, Washington.

What is the rainiest month in Union Gap?

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 in Union Gap?

January through March, September, November and December are months with snowfall.

How much does it snow in Union Gap?

In Union Gap, Washington, during the entire year, snow falls for 18.5 days and aggregates up to 7.8" (198mm) of snow.

What is the month with the least sunshine in Union Gap?

With an average of 5.6h of sunshine, January has the least sunshine of the year in Union Gap, Washington.

What is the month with the lowest UV index in Union Gap?

The months with the lowest UV index in Union Gap, Washington, are January, February, November and December, with an average maximum UV index of 2.

When is Daylight Saving Time (DST) in Union Gap?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Union Gap, 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.

When it does not snow in Union Gap?

April through August and October are months without snowfall in Union Gap.

When are the longest days in Union Gap?

The month with the longest days is June, with an average of 15h and 48min of daylight.

What is the least humid month in Union Gap?

The months with the lowest humidity are July and August, with an average relative humidity of 39%.

What is the driest month in Union Gap?

The month with the least rainfall in Union Gap, Washington, 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 in Union Gap?

July and August, with an average of 12.1h of sunshine, are months with the most sunshine in Union Gap.

When is the highest UV index in Union Gap?

July is the month with the highest UV index, with an average maximum UV index of 7.

What is the hottest time of year in Union Gap?

With its average high temperature of 86.5°F (30.3°C) and a low of 60.3°F (15.7°C), August is regarded as the warmest month in Union Gap, Washington.

What time of the year is the coldest in Union Gap?

December brings the lowest temperatures in Union Gap, with an average high of 36.9°F (2.7°C) and an average low of 25.5°F (-3.6°C).

When does it snow the most in Union Gap?

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 in Union Gap?

With an average of 8h and 36min of daylight, December has the shortest days of the year.

Average temperature
Union Gap, WA

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).

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Average pressure
Union Gap, WA

Average pressure - Union Gap, WA

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.93"Hg).

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Average wind speed
Union Gap, WA

Average wind speed - Union Gap, WA

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).

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Average humidity
Union Gap, WA

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%).

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Average rainfall
Union Gap, WA

Average rainfall - Union Gap, WA

The wettest month (with the highest rainfall) is January (0.87").
The driest month (with the least rainfall) is July (0.08").

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Average rainfall days
Union Gap, WA

Average rainfall days - Union Gap, WA

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).

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Average snowfall
Union Gap, WA

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").

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Average snowfall days
Union Gap, WA

Average snowfall days - Union Gap, WA

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).

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Average daylight / Average sunshine
Union Gap, WA

Average daylight / Average sunshine - Union Gap, WA

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).

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).

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Average sunshine days
Union Gap, WA

Average sunshine days - Union Gap, WA

The month with the most sunshine days is July (27.5 days).
The month with the least sunshine days is February (15.8 days).

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Average UV index
Union Gap, WA

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).

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Average visibility
Union Gap, WA

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).

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Union Gap, Washington, USA

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