Climate and monthly weather forecastHarper, OR
Climate and monthly weather forecast
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 »Updated: Jun 4, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
With an average relative humidity of 83%, January is the most humid month.
Throughout the year, there are 57 rainfall days, and 2.99" (76mm) of precipitation is accumulated.
Months with snowfall are January through April, November and December.
In Harper, during the entire year, snow falls for 17.3 days and aggregates up to 4.21" (107mm) of snow.
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
The months with the most rainfall are March and May, with an average 0.39" (10mm) of precipitation.
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.
May through October are months without snowfall.
The month with the longest days in Harper is June, with an average of 15h and 24min of daylight.
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).
July and August, with an average relative humidity of 28%, are the least humid months.
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.
With an average of 12.1h of sunshine, July has the most sunshine of the year in Harper.
With an average maximum UV index of 7, July is the month with the highest UV index.
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).
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.
December has the shortest days of the year, with an average of 9h and 0min of daylight.
The month with the least sunshine is December, with an average of 5.2h of sunshine.
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 in January:
30.24"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.04"Hg - Average pressure in April:
30"Hg - Average pressure in May:
29.94"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.93"Hg - Average pressure in August:
29.92"Hg - Average pressure in September:
29.96"Hg - Average pressure in October:
30.05"Hg - Average pressure in November:
30.13"Hg - Average pressure in December:
30.2"Hg
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 in January:
3.9mph - Average wind speed in February:
5.2mph - Average wind speed in March:
6.3mph - Average wind speed in April:
7.1mph - Average wind speed in May:
6.9mph - Average wind speed in June:
6.9mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
6mph - Average wind speed in September:
5.8mph - Average wind speed in October:
5.2mph - Average wind speed in November:
4.8mph - Average wind speed in December:
4.3mph
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
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 in January:
0.35" - Average rainfall in February:
0.31" - Average rainfall in March:
0.39" - Average rainfall in April:
0.24" - Average rainfall in May:
0.39" - Average rainfall in June:
0.31"
- Average rainfall in July:
0.08" - Average rainfall in August:
0.08" - Average rainfall in September:
0.12" - Average rainfall in October:
0.16" - Average rainfall in November:
0.2" - Average rainfall in December:
0.35"
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 in January:
5.2 days - Average rainfall days in February:
5.8 days - Average rainfall days in March:
8.4 days - Average rainfall days in April:
7 days - Average rainfall days in May:
5.4 days - Average rainfall days in June:
4.4 days
- Average rainfall days in July:
2.6 days - Average rainfall days in August:
2.3 days - Average rainfall days in September:
2.8 days - Average rainfall days in October:
4 days - Average rainfall days in November:
3.9 days - Average rainfall days in December:
5.2 days
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
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 in January:
4.2 days - Average snowfall days in February:
4 days - Average snowfall days in March:
1.2 days - Average snowfall days in April:
0.3 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 days - Average snowfall days in October:
0 days - Average snowfall days in November:
1.5 days - Average snowfall days in December:
6.1 days
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 in January:
9h and 24min - Average daylight in February:
10h and 30min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 30min - Average daylight in May:
14h and 48min - Average daylight in June:
15h and 24min
- Average daylight in July:
15h and 6min - Average daylight in August:
13h and 54min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 42min - Average daylight in December:
9h and 0min
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).
- Average sunshine in January:
5h and 18min - Average sunshine in February:
7h and 18min - Average sunshine in March:
8h and 0min - Average sunshine in April:
9h and 30min - Average sunshine in May:
11h and 18min - Average sunshine in June:
11h and 36min
- Average sunshine in July:
12h and 6min - Average sunshine in August:
11h and 12min - Average sunshine in September:
9h and 36min - Average sunshine in October:
8h and 12min - Average sunshine in November:
6h and 36min - Average sunshine in December:
5h and 12min
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 in January:
22.2 days - Average sunshine days in February:
20.2 days - Average sunshine days in March:
20.1 days - Average sunshine days in April:
21.6 days - Average sunshine days in May:
23.8 days - Average sunshine days in June:
23.1 days
- Average sunshine days in July:
26.8 days - Average sunshine days in August:
25.9 days - Average sunshine days in September:
26.5 days - Average sunshine days in October:
25.4 days - Average sunshine days in November:
24 days - Average sunshine days in December:
21.7 days
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
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
Harper, OR
The months with the most cloud cover are January and December (Cloud cover 43).
The months with the least cloud cover are July and August (Cloud cover 8).
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).
