Expand
Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, the same as December, is an icy winter month in Heppner, Oregon, with an average temperature varying between 28.2°F (-2.1°C) and 39.7°F (4.3°C). January commences with an average high-temperature of a still icy 39.7°F (4.3°C), showing little deviation from December's 37.9°F (3.3°C). Weather in January »
Weather in February
February, the last month of the winter in Heppner, is also a wintry month, with temperature in the range of an average low of 29.8°F (-1.2°C) and an average high of 42.1°F (5.6°C). In February, Heppner experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 39.7°F (4.3°C) in January to a still icy 42.1°F (5.6°C). Weather in February »
Weather in March
March, the first month of the spring in Heppner, is a frosty month, with an average temperature ranging between min 34.2°F (1.2°C) and max 48.9°F (9.4°C). The start of March is characterized by a subtle increase in the average high-temperature, transitioning from an icy 42.1°F (5.6°C) in February to a frosty 48.9°F (9.4°C). Weather in March »
Weather in April
April in Heppner, Oregon, is a mild spring month, with an average temperature varying between 38.7°F (3.7°C) and 56.8°F (13.8°C). April brings a slight increase in the average high-temperature, progressing from a chilly 48.9°F (9.4°C) in March to a mild 56.8°F (13.8°C). Weather in April »
Weather in May
The last month of the spring, May, is an enjoyable month in Heppner, Oregon, with an average temperature varying between 45.5°F (7.5°C) and 66.2°F (19°C). As May arrives, Heppner's weather shows an increase in high-temperatures, moving from April's refreshing 56.8°F (13.8°C) to a comfortable 66.2°F (19°C). Weather in May »
Weather in June
June, the first month of the summer in Heppner, is an agreeable month, with an average temperature ranging between max 72.9°F (22.7°C) and min 51.6°F (10.9°C). The average high-temperature mildly increases in June, edging from a comfortable 66.2°F (19°C) in May to an agreeable 72.9°F (22.7°C). Weather in June »
Weather in July
July in Heppner, Oregon, is a moderately hot summer month, with an average temperature fluctuating between 83.1°F (28.4°C) and 59.5°F (15.3°C). July, known for its average high temperature of 83.1°F (28.4°C) and an average low temperature of 59.5°F (15.3°C), is the warmest month. Weather in July »
Weather in August
August, the last month of the summer in Heppner, is another warm month, with an average temperature fluctuating between 82.2°F (27.9°C) and 60.8°F (16°C). August's average high-temperature is a still warm 82.2°F (27.9°C), maintaining a close comparison with July's 83.1°F (28.4°C). Weather in August »
Weather in September
September, the first month of the autumn in Heppner, is still a pleasant month, with an average temperature varying between 54.1°F (12.3°C) and 72.7°F (22.6°C). With the beginning of September, the average high-temperature shows a decrease, transitioning from a warm 82.2°F (27.9°C) in August to an agreeable 72.7°F (22.6°C). Weather in September »
Weather in October
October, the same as September, in Heppner, Oregon, is a moderate autumn month, with an average temperature varying between 58.6°F (14.8°C) and 43.3°F (6.3°C). October's arrival corresponds with a decrease in average high-temperatures, from September's pleasant 72.7°F (22.6°C) to a moderate 58.6°F (14.8°C). Weather in October »
Weather in November
November, the last month of the autumn in Heppner, is another chilly month, with an average temperature ranging between max 46.9°F (8.3°C) and min 34.7°F (1.5°C). In November, the average high-temperature goes from a moderate 58.6°F (14.8°C) in October to a frosty 46.9°F (8.3°C). Weather in November »
Weather in December
The first month of the winter, December, is still a cold month in Heppner, Oregon, with an average temperature varying between 37.9°F (3.3°C) and 27.1°F (-2.7°C). With average high and low temperatures of 37.9°F (3.3°C) and 27.1°F (-2.7°C) respectively, December is Heppner's coldest month. Weather in December »
Updated: Jul 15, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the most humid month?
The most humid month is January, with an average relative humidity of 79%.
How much does it rain?
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?
Months with snowfall are January through May, September through December.
How much does it snow?
In Heppner, during the entire year, snow falls for 31.3 days and aggregates up to 18.54" (471mm) of snow.
What is the month with the least sunshine?
January and February, with an average of 5.3h of sunshine, are months with the least sunshine.
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 wettest month?
The month with the most rainfall is February, when the rain falls for 12.8 days and typically aggregates up to 1.81" (46mm) of precipitation.
What is the snowiest month?
February is the month with the most snowfall. Snow falls for 7.5 days and accumulates 6.61" (168mm) of snow.
When is Daylight Saving Time (DST)?
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 Heppner, snow does not fall in June through August.
When are the longest days?
June has the longest days of the year in Heppner, with an average of 15h and 36min of daylight.
What is the hottest time of year?
July proves to be the warmest month, recording an average peak temperature of 83.1°F (28.4°C) and a minimum temperature of 59.5°F (15.3°C).
What are the least humid months?
July and August, with an average relative humidity of 39%, are the least humid months.
What is the driest month?
July is the month with the least rainfall. Rain falls for 4.3 days and accumulates 0.24" (6mm) of precipitation.
What are the months with the most sunshine?
The months with the most sunshine are July and August, with an average of 12h of sunshine.
When is the highest UV index?
With an average maximum UV index of 7, July is the month with the highest UV index.
What are the coldest months?
December, with average temperatures reaching a high of 37.9°F (3.3°C) and a low of 27.1°F (-2.7°C), is the coldest month.
What is the month with the shortest days in Heppner?
The month with the shortest days is December, with an average of 8h and 48min of daylight.
Average temperature
Heppner, OR
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is December (37.9°F).
The month with the highest average low temperature is August (60.8°F).
The coldest month (with the lowest average low temperature) is December (27.1°F).
Average pressure
Heppner, OR
- Average pressure in January:
30.19"Hg - Average pressure in February:
30.1"Hg - Average pressure in March:
30.03"Hg - Average pressure in April:
30.01"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.94"Hg
- Average pressure in July:
29.94"Hg - Average pressure in August:
29.92"Hg - Average pressure in September:
29.96"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.1"Hg - Average pressure in December:
30.17"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is August (29.92"Hg).
Average wind speed
Heppner, OR
- Average wind speed in January:
7.8mph - Average wind speed in February:
8.3mph - Average wind speed in March:
8.6mph - Average wind speed in April:
9.4mph - Average wind speed in May:
8.7mph - Average wind speed in June:
9.1mph
- Average wind speed in July:
8mph - Average wind speed in August:
7.5mph - Average wind speed in September:
7.2mph - Average wind speed in October:
7.4mph - Average wind speed in November:
8.1mph - Average wind speed in December:
8mph
The windiest month (with the highest average wind speed) is April (9.4mph).
The calmest month (with the lowest average wind speed) is September (7.2mph).
Average humidity
Heppner, OR
The month with the highest relative humidity is January (79%).
The months with the lowest relative humidity are July and August (39%).
Average rainfall
Heppner, OR
- Average rainfall in January:
1.54" - Average rainfall in February:
1.81" - Average rainfall in March:
1.61" - Average rainfall in April:
1.34" - Average rainfall in May:
1.18" - Average rainfall in June:
0.94"
- Average rainfall in July:
0.24" - Average rainfall in August:
0.47" - Average rainfall in September:
0.47" - Average rainfall in October:
1.18" - Average rainfall in November:
1.1" - Average rainfall in December:
1.65"
The wettest month (with the highest rainfall) is February (1.81").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days
Heppner, OR
- Average rainfall days in January:
14 days - Average rainfall days in February:
12.8 days - Average rainfall days in March:
17 days - Average rainfall days in April:
14.4 days - Average rainfall days in May:
12.3 days - Average rainfall days in June:
9.1 days
- Average rainfall days in July:
4.3 days - Average rainfall days in August:
4.1 days - Average rainfall days in September:
6.6 days - Average rainfall days in October:
12.4 days - Average rainfall days in November:
12.1 days - Average rainfall days in December:
12.8 days
The month with the highest number of rainy days is March (17 days).
The month with the least rainy days is August (4.1 days).
Average snowfall
Heppner, OR
- Average snowfall in January:
3.78" - Average snowfall in February:
6.61" - Average snowfall in March:
2.24" - Average snowfall in April:
0.31" - Average snowfall in May:
0.04" - Average snowfall in June:
0"
The month with the highest snowfall is February (6.61").
The months with the least snowfall are June, July and August (0").
Average snowfall days
Heppner, OR
- Average snowfall days in January:
6.1 days - Average snowfall days in February:
7.5 days - Average snowfall days in March:
4.3 days - Average snowfall days in April:
1 days - Average snowfall days in May:
0.2 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:
0.3 days - Average snowfall days in October:
0.3 days - Average snowfall days in November:
2.4 days - Average snowfall days in December:
9.2 days
The month with the highest number of snowfall days is December (9.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight / Average sunshine
Heppner, OR
- Average daylight in January:
9h and 1min - Average daylight in February:
10h and 2min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 4min - Average daylight in May:
14h and 5min - Average daylight in June:
15h and 4min
- Average daylight in July:
15h and 1min - Average daylight in August:
14h and 0min - Average daylight in September:
12h and 3min - Average daylight in October:
10h and 5min - Average daylight in November:
9h and 3min - Average daylight in December:
8h and 5min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in January:
5h and 2min - Average sunshine in February:
5h and 2min - Average sunshine in March:
7h and 1min - Average sunshine in April:
9h and 5min - Average sunshine in May:
10h and 5min - Average sunshine in June:
11h and 2min
- Average sunshine in July:
12h and 0min - Average sunshine in August:
12h and 0min - Average sunshine in September:
10h and 5min - Average sunshine in October:
6h and 4min - Average sunshine in November:
6h and 1min - Average sunshine in December:
5h and 2min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January and February (Average sunshine: 5h and 18min).
Average sunshine days
Heppner, OR
- Average sunshine days in January:
13.3 days - Average sunshine days in February:
10.2 days - Average sunshine days in March:
9.5 days - Average sunshine days in April:
13.3 days - Average sunshine days in May:
16.3 days - Average sunshine days in June:
19.2 days
- Average sunshine days in July:
24.4 days - Average sunshine days in August:
24.3 days - Average sunshine days in September:
21.2 days - Average sunshine days in October:
17.6 days - Average sunshine days in November:
14.5 days - Average sunshine days in December:
12.8 days
The month with the most sunshine days is July (24.4 days).
The month with the least sunshine days is March (9.5 days).
Average UV index
Heppner, 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
Heppner, OR
The months with the most cloud cover are January and February (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility
Heppner, 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).
Heppner, Oregon, USA
Weather forecast for your location
1. Click Locate me button
2. Allow the app to use your location
2. Allow the app to use your location