Climate and monthly weather forecast
Harper, OR

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Weather in January

January, like December, in Harper, Oregon, is a wintry winter month, with an average temperature varying between 34.7°F (1.5°C) and 22.1°F (-5.5°C). January's arrival registers an average high-temperature of a still cold 34.7°F (1.5°C), closely aligning with the temperature of the previous month. Weather in January »

Weather in February

February, the last month of the winter in Harper, is also a wintry month, with an average temperature ranging between max 40.6°F (4.8°C) and min 28°F (-2.2°C). Harper observes a slight uplift in the average high-temperature with the onset of February, adjusting from January's 34.7°F (1.5°C) to a still cold 40.6°F (4.8°C). Weather in February »

Weather in March

March, the first month of the spring in Harper, is a fresh month, with an average temperature fluctuating between 51.1°F (10.6°C) and 35.2°F (1.8°C). Harper's transition into March is marked by a rise in the average high-temperature, advancing from a cold 40.6°F (4.8°C) in February to a fresh 51.1°F (10.6°C). Weather in March »

Weather in April

April in Harper, Oregon, is a mild spring month, with an average temperature fluctuating between 59.5°F (15.3°C) and 39.6°F (4.2°C). April's arrival coincides with a marginal rise in the average high-temperature, moving from March's fresh 51.1°F (10.6°C) to a moderate 59.5°F (15.3°C). Weather in April »

Weather in May

The last month of the spring, May, is a pleasant month in Harper, Oregon, with an average temperature varying between 47.1°F (8.4°C) and 70°F (21.1°C). May's arrival sees a rise in the average high-temperature, jumping from April's mild 59.5°F (15.3°C) to a pleasant 70°F (21.1°C). Weather in May »

Weather in June

The first month of the summer, June, is a moderately hot month in Harper, Oregon, with an average temperature varying between 55°F (12.8°C) and 79°F (26.1°C). June sees a temperature increase, moving from an agreeable 70°F (21.1°C) in May to a moderately hot 79°F (26.1°C). Weather in June »

Weather in July

July is a tropical summer month in Harper, Oregon, with an average temperature fluctuating between 63.3°F (17.4°C) and 91°F (32.8°C). July, recognised by an average high temperature of 91°F (32.8°C) and a low of 63.3°F (17.4°C), is Harper's warmest month. Weather in July »

Weather in August

The last month of the summer, August, is another tropical month in Harper, Oregon, with an average temperature varying between 63.5°F (17.5°C) and 89.4°F (31.9°C). The ushering in of August brings an average high-temperature of a still tropical 89.4°F (31.9°C), closely mirroring the 91°F (32.8°C) of July. Weather in August »

Weather in September

The first month of the autumn, September, is also a moderately hot month in Harper, Oregon, with temperature in the range of an average high of 78.4°F (25.8°C) and an average low of 55.9°F (13.3°C). The average high-temperature drops in September, from August's tropical 89.4°F (31.9°C) to a moderately hot 78.4°F (25.8°C). Weather in September »

Weather in October

October, the same as September, is another enjoyable autumn month in Harper, Oregon, with an average temperature varying between 60.8°F (16°C) and 43.7°F (6.5°C). The arrival of October brings a significant change in Harper's weather, with average high-temperatures dropping from September's warm 78.4°F (25.8°C) to a refreshing 60.8°F (16°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a frosty month in Harper, Oregon, with an average temperature fluctuating between 46.4°F (8°C) and 31.5°F (-0.3°C). The beginning of November signals a clear reduction in the average high-temperature, falling from a refreshing 60.8°F (16°C) in October to a frosty 46.4°F (8°C). Weather in November »

Weather in December

The first month of the winter, December, is still a cold month in Harper, Oregon, with an average temperature fluctuating between 22.1°F (-5.5°C) and 34.3°F (1.3°C). December is the coldest month, with the temperature often reaching an average high of 34.3°F (1.3°C) and an average low of 22.1°F (-5.5°C). Weather in December »

Frequently asked questions

What is the most humid month?

With an average relative humidity of 83%, January is the most humid month.

How much does it rain?

Throughout the year, there are 57 rainfall days, and 2.99" (76mm) of precipitation is accumulated.

When does it snow?

Months with snowfall are January through April, November and December.

How much does it snow?

In Harper, during the entire year, snow falls for 17.3 days and aggregates up to 4.21" (107mm) of snow.

What are the months with the lowest UV index?

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

What is the rainiest month?

The months with the most rainfall are March and May, with an average 0.39" (10mm) of precipitation.

When is Daylight Saving Time (DST)?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Harper, and the time zone changes from MST to MDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from MDT to MST.

When it does not snow in Harper?

May through October are months without snowfall.

When are the longest days?

The month with the longest days in Harper is June, with an average of 15h and 24min of daylight.

What part of the year is the hottest?

In Harper, Oregon, the peak temperatures are generally noted in July, averaging a high of 91°F (32.8°C) and a low of 63.3°F (17.4°C).

What is the least humid month?

July and August, with an average relative humidity of 28%, are the least humid months.

What is the driest month?

July and August are months with the least rain in Harper when the rain falls for 2.6 days and typically aggregates up to 0.08" (2mm) of rain.

What month has the most sunshine in Harper?

With an average of 12.1h of sunshine, July has the most sunshine of the year in Harper.

When is the highest UV index?

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

What time of the year is the coldest?

The lowest temperatures are recorded in December, with averages reaching a high of 34.3°F (1.3°C) and a low of 22.1°F (-5.5°C).

What is the snowiest month?

The month with the most snowfall is December, when snow falls for 6.1 days and typically aggregates up to 1.77" (45mm) of snow.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 9h and 0min of daylight.

What is the month with the least sunshine?

The month with the least sunshine is December, with an average of 5.2h of sunshine.

Average temperature
Harper, OR

Average temperature - Harper, OR

The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is December (34.3°F).

The month with the highest average low temperature is August (63.5°F).
The coldest months (with the lowest average low temperature) are January and December (22.1°F).

Average pressure
Harper, OR

Average pressure - Harper, OR

The month with the highest atmospheric pressure is January (30.24"Hg).
The month with the lowest atmospheric pressure is August (29.92"Hg).

Average wind speed
Harper, OR

Average wind speed - Harper, OR

The windiest month (with the highest average wind speed) is April (7.1mph).
The calmest month (with the lowest average wind speed) is January (3.9mph).

Average humidity
Harper, OR

Average humidity - Harper, OR

The month with the highest relative humidity is January (83%).
The months with the lowest relative humidity are July and August (28%).

Average rainfall
Harper, OR

Average rainfall - Harper, OR

The wettest months (with the highest rainfall) are March and May (0.39").
The driest months (with the least rainfall) are July and August (0.08").

Average rainfall days
Harper, OR

Average rainfall days - Harper, OR

The month with the highest number of rainy days is March (8.4 days).
The month with the least rainy days is August (2.3 days).

Average snowfall
Harper, OR

Average snowfall - Harper, OR

The month with the highest snowfall is December (1.77").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days
Harper, OR

Average snowfall days - Harper, OR

The month with the highest number of snowfall days is December (6.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight / Average sunshine
Harper, OR

Average daylight / Average sunshine - Harper, OR

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).

Average sunshine days
Harper, OR

Average sunshine days - Harper, OR

The month with the most sunshine days is July (26.8 days).
The month with the least sunshine days is March (20.1 days).

Average UV index
Harper, OR

Average UV index - Harper, 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).

Average visibility
Harper, OR

Average visibility - Harper, OR

The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).

Harper, Oregon, USA

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