Climate and monthly weather forecast
Umatilla, OR

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Weather in January

January, the same as December, is a wintry winter month in Umatilla, Oregon, with an average temperature ranging between min 29.7°F (-1.3°C) and max 39.9°F (4.4°C). The advent of January reveals an average high-temperature of a still cold 39.9°F (4.4°C), showing minimal difference from the prior month. Weather in January »

Weather in February

February, the last month of the winter in Umatilla, is a frosty month, with temperature in the range of an average low of 32.9°F (0.5°C) and an average high of 45.1°F (7.3°C). Umatilla, Oregon, measures an average high-temperature of a chilly 45.1°F (7.3°C) in February, nearly consistent with the preceding month. Weather in February »

Weather in March

The first month of the spring, March, is a cool month in Umatilla, Oregon, with an average temperature fluctuating between 54.1°F (12.3°C) and 37.9°F (3.3°C). The arrival of March signals an increase in the average high-temperature, moving from a chilly 45.1°F (7.3°C) in February to a fresh 54.1°F (12.3°C). Weather in March »

Weather in April

April in Umatilla, Oregon, is a comfortable spring month, with an average temperature varying between 62.4°F (16.9°C) and 43.3°F (6.3°C). April's arrival signals a subtle increase in average high-temperatures, moving from March's cool 54.1°F (12.3°C) to a refreshing 62.4°F (16.9°C). Weather in April »

Weather in May

The last month of the spring, May, is a pleasant month in Umatilla, Oregon, with temperature in the range of an average high of 72.1°F (22.3°C) and an average low of 49.8°F (9.9°C). The rise of average high-temperatures is seen in May, with an increase from a refreshing 62.4°F (16.9°C) in April to a pleasant 72.1°F (22.3°C). Weather in May »

Weather in June

The first month of the summer, June, is a warm month in Umatilla, Oregon, with an average temperature fluctuating between 55.9°F (13.3°C) and 79.2°F (26.2°C). June's arrival brings a modest temperature shift, moving from a pleasant 72.1°F (22.3°C) in May to a moderately hot 79.2°F (26.2°C). Weather in June »

Weather in July

July is a tropical summer month in Umatilla, Oregon, with an average temperature varying between 62.8°F (17.1°C) and 89.1°F (31.7°C). July is the month when Umatilla, Oregon, sees the highest average temperatures, with a high of 89.1°F (31.7°C) and a low of 62.8°F (17.1°C). Weather in July »

Weather in August

August, the last month of the summer in Umatilla, is another hot month, with temperature in the range of an average low of 64.2°F (17.9°C) and an average high of 87.8°F (31°C). Umatilla starts August with an average high-temperature of a still tropical 87.8°F (31°C), hinting at a minimal fluctuation from July. Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in Umatilla, Oregon, with an average temperature fluctuating between 57.4°F (14.1°C) and 77.2°F (25.1°C). Umatilla's progression into September includes a drop in the average high-temperature, from a hot 87.8°F (31°C) in August to a moderately hot 77.2°F (25.1°C). Weather in September »

Weather in October

October, like September, in Umatilla, Oregon, is another enjoyable autumn month, with temperature in the range of an average low of 46.8°F (8.2°C) and an average high of 61.9°F (16.6°C). Umatilla in October showcases a distinct temperature shift, moving from an average high of a warm 77.2°F (25.1°C) in September to a refreshing 61.9°F (16.6°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a frosty month in Umatilla, Oregon, with temperature in the range of an average high of 49.1°F (9.5°C) and an average low of 36.7°F (2.6°C). November involves a decrease in temperature, down from a refreshing 61.9°F (16.6°C) in October to a chilly 49.1°F (9.5°C). Weather in November »

Weather in December

The first month of the winter, December, is still a cold month in Umatilla, Oregon, with an average temperature ranging between max 38.7°F (3.7°C) and min 28.6°F (-1.9°C). December brings the lowest temperatures, with an average high of 38.7°F (3.7°C) and an average low of 28.6°F (-1.9°C). Weather in December »
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Frequently asked questions

What is the most humid month in Umatilla?

With an average relative humidity of 79%, January is the most humid month in Umatilla.

How much does it rain in Umatilla?

Throughout the year, in Umatilla, Oregon, there are 106.1 rainfall days, and 7.76" (197mm) of precipitation is accumulated.

When does it snow in Umatilla?

Months with snowfall in Umatilla, Oregon, are January through March, September, November and December.

How many days does it snow in Umatilla?

Throughout the year, there are 10.3 snowfall days, and 6.02" (153mm) of snow is accumulated.

What are the months with the least sunshine in Umatilla?

January and December, with an average of 5.4h of sunshine, are months with the least sunshine in Umatilla.

What is the month with the lowest UV index in Umatilla?

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

What is the snowiest month in Umatilla?

The month with the most snowfall is February, when snow falls for 2.9 days and typically aggregates up to 2.83" (72mm) of snow.

What is the wettest month in Umatilla?

March is the month with the most rainfall in Umatilla. Rain falls for 13.1 days and accumulates 1.02" (26mm) of precipitation.

When is Daylight Saving Time (DST) in Umatilla?

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 in Umatilla?

In Umatilla, snow does not fall in April through August and October.

When are the longest days in Umatilla?

With an average of 15h and 42min of daylight, June has the longest days of the year in Umatilla, Oregon.

What time of the year is the hottest in Umatilla?

July is the month that records the highest temperatures, with averages ranging from a high of 89.1°F (31.7°C) to a low of 62.8°F (17.1°C).

What are the least humid months in Umatilla?

The months with the lowest humidity are July and August, with an average relative humidity of 36%.

What is the driest month in Umatilla?

July is the month with the least rainfall in Umatilla. Rain falls for 3.8 days and accumulates 0.16" (4mm) of precipitation.

What is the month with the most sunshine in Umatilla?

July and August, with an average of 12h of sunshine, are months with the most sunshine.

When is the highest UV index in Umatilla?

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

What is the coldest time of year in Umatilla?

Umatilla's December weather, marked by an average high temperature of 38.7°F (3.7°C) and an average low temperature of 28.6°F (-1.9°C), is the coldest in the year.

What is the month with the shortest days in Umatilla?

The month with the shortest days is December, with an average of 8h and 42min of daylight.

Average temperature
Umatilla, OR

Average temperature - Umatilla, OR

The warmest month (with the highest average high temperature) is July (89.1°F).
The month with the lowest average high temperature is December (38.7°F).

The month with the highest average low temperature is August (64.2°F).
The coldest month (with the lowest average low temperature) is December (28.6°F).

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Average pressure
Umatilla, OR

Average pressure - Umatilla, OR

The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).

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Average wind speed
Umatilla, OR

Average wind speed - Umatilla, OR

The windiest month (with the highest average wind speed) is April (9.3mph).
The calmest month (with the lowest average wind speed) is December (6.2mph).

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Average humidity
Umatilla, OR

Average humidity - Umatilla, OR

The month with the highest relative humidity is January (79%).
The months with the lowest relative humidity are July and August (36%).

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Average rainfall
Umatilla, OR

Average rainfall - Umatilla, OR

The wettest month (with the highest rainfall) is March (1.02").
The driest month (with the least rainfall) is July (0.16").

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Average rainfall days
Umatilla, OR

Average rainfall days - Umatilla, OR

The month with the highest number of rainy days is March (13.1 days).
The month with the least rainy days is July (3.8 days).

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Average snowfall
Umatilla, OR

Average snowfall - Umatilla, OR

The month with the highest snowfall is February (2.83").
The months with the least snowfall are April, May, June, July, August and October (0").

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Average snowfall days
Umatilla, OR

Average snowfall days - Umatilla, OR

The month with the highest number of snowfall days is December (3.2 days).
The months with the least snowfall days are April, May, June, July, August and October (0 days).

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Average daylight / Average sunshine
Umatilla, OR

Average daylight / Average sunshine - Umatilla, OR

The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).

The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 5h and 24min).

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Average sunshine days
Umatilla, OR

Average sunshine days - Umatilla, OR

The month with the most sunshine days is July (25.3 days).
The month with the least sunshine days is February (14 days).

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Average UV index
Umatilla, OR

Average UV index - Umatilla, OR

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
Umatilla, OR

Average visibility - Umatilla, OR

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Umatilla, Oregon, USA

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