Heppner
Oregon, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Heppner, OR

January, the same as December, is a wintry winter month in Heppner, Oregon, with average temperature varying between 39.7°F (4.3°C) and 28.2°F (-2.1°C). In January, the average high-temperature is relatively the same as in December - a still cold 39.7°F (4.3°C). Weather in January »

The last month of the winter, February, is also a wintry month in Heppner, Oregon, with average temperature ranging between max 42.1°F (5.6°C) and min 29.8°F (-1.2°C). In February, the average high-temperature is practically the same as in January - a still wintry 42.1°F (5.6°C). Weather in February »

March, the first month of the spring, in Heppner, is a chilly month, with average temperature fluctuating between 48.9°F (9.4°C) and 34.2°F (1.2°C). In March, the average high-temperature marginally rises, from a cold 42.1°F (5.6°C) in February, to a chilly 48.9°F (9.4°C). Weather in March »

April is a moderate spring month in Heppner, Oregon, with average temperature varying between 56.8°F (13.8°C) and 38.7°F (3.7°C). In Heppner, the average high-temperature marginally rises, from a frosty 48.9°F (9.4°C) in March, to a moderate 56.8°F (13.8°C). Weather in April »

The last month of the spring, May, is a comfortable month in Heppner, Oregon, with average temperature ranging between min 45.5°F (7.5°C) and max 66.2°F (19°C). In Heppner, the average high-temperature in May rises, from a moderate 56.8°F (13.8°C) in April, to an enjoyable 66.2°F (19°C). Weather in May »

June, the first month of the summer, in Heppner, is a pleasant month, with average temperature fluctuating between 72.9°F (22.7°C) and 51.6°F (10.9°C). In June, the average high-temperature slightly increases, from a comfortable 66.2°F (19°C) in May, to a pleasant 72.9°F (22.7°C). Weather in June »

July is a warm summer month in Heppner, Oregon, with average temperature fluctuating between 59.5°F (15.3°C) and 83.1°F (28.4°C). July is the warmest month, with an average high-temperature of 83.1°F (28.4°C) and an average low-temperature of 59.5°F (15.3°C). Weather in July »

August, the last month of the summer, in Heppner, is also a moderately hot month, with average temperature ranging between max 82.2°F (27.9°C) and min 60.8°F (16°C). In Heppner, the average high-temperature in August is relatively the same as in July - a still moderately hot 82.2°F (27.9°C). Weather in August »

September, the first month of the autumn, in Heppner, is also an agreeable month, with average temperature fluctuating between 54.1°F (12.3°C) and 72.7°F (22.6°C). In Heppner, the average high-temperature in September decreases, from a moderately hot 82.2°F (27.9°C) in August, to an agreeable 72.7°F (22.6°C). Weather in September »

October, the same as September, in Heppner, Oregon, is another mild autumn month, with average temperature fluctuating between 58.6°F (14.8°C) and 43.3°F (6.3°C). In October, the average high-temperature drops, from an agreeable 72.7°F (22.6°C) in September, to a moderate 58.6°F (14.8°C). Weather in October »

November, the last month of the autumn, in Heppner, is another chilly month, with average temperature varying between 46.9°F (8.3°C) and 34.7°F (1.5°C). In Heppner, the average high-temperature drops, from a mild 58.6°F (14.8°C) in October, to a chilly 46.9°F (8.3°C). Weather in November »

The first month of the winter, December, is also a wintry month in Heppner, Oregon, with average temperature varying between 37.9°F (3.3°C) and 27.1°F (-2.7°C). With an average high-temperature of 37.9°F (3.3°C) and an average low-temperature of 27.1°F (-2.7°C), December is the coldest month. Weather in December »

What is the most humid month in Heppner?

The most humid month in Heppner is January, with an average relative humidity of 79%.

How much does it rain in Heppner?

In Heppner, during the entire year, the rain falls for 131.9 days and collects up to 13.54" (344mm) of precipitation.

When does it snow in Heppner?

January through May, September through December are months with snowfall in Heppner, Oregon.

How many days does it snow in Heppner?

Throughout the year, in Heppner, Oregon, there are 31.3 snowfall days, and 18.54" (471mm) of snow is accumulated.

What is the month with the least sunshine in Heppner?

Months with the least sunshine in Heppner are January and February, with an average of 5.3h of sunshine.

What are the months with the lowest UV index in Heppner?

Months with the lowest UV index in Heppner are January, February, November and December, with an average maximum UV index of 2.

What is the wettest month in Heppner?

February is the month with the most rainfall. Rain falls for 12.8 days and accumulates 1.81" (46mm) of precipitation.

What is the snowiest month in Heppner?

The month with the most snowfall in Heppner is February when snow falls for 7.5 days and typically aggregates up to 6.61" (168mm) of snow.

When it does not snow in Heppner?

In Heppner snow does not fall in June through August.

When are the longest days in Heppner?

The month with the longest days in Heppner, Oregon, is June, with an average of 15.6h of daylight.

What is the warmest month in Heppner?

July is the warmest month in Heppner, with an average high-temperature of 83.1°F (28.4°C) and an average low-temperature of 59.5°F (15.3°C).

What is the least humid month in Heppner?

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

What is the driest month in Heppner?

The month with the least rainfall in Heppner is July when the rain falls for 4.3 days and typically collects 0.24" (6mm) of precipitation.

What are the months with the most sunshine in Heppner?

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

When is the highest UV index in Heppner?

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

What is the coldest month in Heppner?

December is the coldest month in Heppner, Oregon, with an average high-temperature of 37.9°F (3.3°C) and an average low-temperature of 27.1°F (-2.7°C).

What is the month with the shortest days in Heppner?

The month with the shortest days in Heppner, Oregon, is December, with an average of 8.8h of daylight.
Average temperature - Heppner, OR
Average humidity - Heppner, OR
Average rainfall - Heppner, OR

The wettest month (with the highest rainfall) is February (1.81").
The driest month (with the lowest rainfall) is July (0.24").

Average rainfall days - Heppner, OR

The month with the highest number of rainy days is March (17 days).
The month with the lowest number of rainy days is August (4.1 days).

Average snowfall - Heppner, OR
Average snowfall days - Heppner, OR

The month with the highest number of snowfall days is December (9.2 days).
Months with the lowest number of snowfall days are June, July and August (0 days).

Average daylight / Average sunshine - Heppner, OR

The month with the longest days is June (Average daylight: 15.6h).
The month with shortest days is December (Average daylight: 8.8h).

Months with most sunshine are July and August (Average sunshine: 12h).
Months with least sunshine are January and February (Average sunshine: 5.3).