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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, in Jefferson, Oregon, is another chilly winter month, with temperature in the range of an average low of 35.2°F (1.8°C) and an average high of 47.8°F (8.8°C). As December turns into January, the average high-temperatures rest at a still chilly 47.8°F (8.8°C), showing a minor variation from the prior month. Weather in January »
Weather in February
February, the last month of the winter in Jefferson, is also a frosty month, with an average temperature fluctuating between 48.7°F (9.3°C) and 35.4°F (1.9°C). February's presence marks an average high-temperature of a still frosty 48.7°F (9.3°C), subtly varied from January's 47.8°F (8.8°C). Weather in February »
Weather in March
March, the first month of the spring in Jefferson, is a cool month, with an average temperature varying between 37.2°F (2.9°C) and 52.9°F (11.6°C). The introduction of March sees an average high-temperature of a cool 52.9°F (11.6°C), hardly deviating from February. Weather in March »
Weather in April
April in Jefferson, Oregon, is a mild spring month, with temperature in the range of an average low of 38.5°F (3.6°C) and an average high of 58.5°F (14.7°C). April introduces a marginal temperature uplift, with average high-temperatures adjusting from March's fresh 52.9°F (11.6°C) to a mild 58.5°F (14.7°C). Weather in April »
Weather in May
May, the last month of the spring in Jefferson, is a comfortable month, with temperature in the range of an average low of 42.4°F (5.8°C) and an average high of 65.8°F (18.8°C). With the onset of May, Jefferson's average high-temperature sees a modest rise, moving from April's moderate 58.5°F (14.7°C) to an enjoyable 65.8°F (18.8°C). Weather in May »
Weather in June
June, the first month of the summer in Jefferson, is an agreeable month, with an average temperature fluctuating between 46.8°F (8.2°C) and 71.4°F (21.9°C). Jefferson observes a slight ascent in average high-temperatures during June, adjusting from a comfortable 65.8°F (18.8°C) in May to a pleasant 71.4°F (21.9°C). Weather in June »
Weather in July
July in Jefferson, Oregon, is a warm summer month, with temperature in the range of an average high of 79.9°F (26.6°C) and an average low of 51.4°F (10.8°C). In Jefferson, the average high-temperature in July slightly increases from a pleasant 71.4°F (21.9°C) in June to a warm 79.9°F (26.6°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Jefferson, Oregon, with an average temperature varying between 81.9°F (27.7°C) and 52.9°F (11.6°C). In Jefferson, August is the warmest month, with temperatures averaging a high of 81.9°F (27.7°C) and a low of 52.9°F (11.6°C). August's mean heat index is estimated at a tropical 86°F (30°C). Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Jefferson, Oregon, with temperature in the range of an average high of 73.8°F (23.2°C) and an average low of 50.2°F (10.1°C). Transitioning from August to September involves a subtle drop in average high-temperatures, descending from 81.9°F (27.7°C) to a still moderately hot 73.8°F (23.2°C). Weather in September »
Weather in October
October, like September, in Jefferson, Oregon, is another comfortable autumn month, with temperature in the range of an average low of 44.6°F (7°C) and an average high of 62.4°F (16.9°C). The transition into October indicates a reduction in the average high-temperature, down to an enjoyable 62.4°F (16.9°C) from September's moderately hot 73.8°F (23.2°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a fresh month in Jefferson, Oregon, with an average temperature ranging between max 51.6°F (10.9°C) and min 39.7°F (4.3°C). November's arrival corresponds with a decrease in average high-temperatures, from October's enjoyable 62.4°F (16.9°C) to a fresh 51.6°F (10.9°C). Weather in November »
Weather in December
December, the first month of the winter in Jefferson, is also a frosty month, with an average temperature ranging between min 34.5°F (1.4°C) and max 45.5°F (7.5°C). December is the month when Jefferson sees the lowest average temperatures, with a high of 45.5°F (7.5°C) and a low of 34.5°F (1.4°C). Weather in December »
[Resources]Frequently asked questions
How many days does it rain in Jefferson?
Throughout the year, in Jefferson, Oregon, there are 164.2 rainfall days, and 26.97" (685mm) of precipitation is accumulated.
When does it snow in Jefferson?
January through March, November and December are months with snowfall in Jefferson.
How many days does it snow in Jefferson?
In Jefferson, Oregon, during the entire year, snow falls for 4.3 days and aggregates up to 2.64" (67mm) of snow.
What are the months with the lowest UV index in Jefferson?
The months with the lowest UV index in Jefferson are January, February, November and December, with an average maximum UV index of 2.
What are the most humid months in Jefferson?
February and December, with an average relative humidity of 87%, are most humid months.
When does it snow the most in Jefferson?
February is the month with the most snowfall. Snow falls for 1.9 days and accumulates 1.3" (33mm) of snow.
What is the month with the least sunshine in Jefferson?
February has the least sunshine of the year, with an average of 4.1h of sunshine.
When is Daylight Saving Time (DST) in Jefferson?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Jefferson, Oregon, 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 Jefferson?
April through October are months without snowfall in Jefferson.
When are the longest days in Jefferson?
The month with the longest days is June, with an average of 15h and 30min of daylight.
What is the driest month in Jefferson?
The month with the least rainfall in Jefferson, Oregon, is July, when the rain falls for 4 days and typically collects 0.24" (6mm) of precipitation.
What is the month with the highest UV index in Jefferson?
The month with the highest UV index is July, with an average maximum UV index of 6.
What is the hottest time of year in Jefferson?
August is Jefferson's warmest month, registering average high temperatures of 81.9°F (27.7°C) and lows of 52.9°F (11.6°C).
What is the least humid month in Jefferson?
August is the least humid month, with an average relative humidity of 66%.
What month has the most sunshine in Jefferson?
The month with the most sunshine in Jefferson is August, with an average of 11.1h of sunshine.
What are the coldest months in Jefferson?
December brings the lowest temperatures in Jefferson, with an average high of 45.5°F (7.5°C) and an average low of 34.5°F (1.4°C).
What is the rainiest month in Jefferson?
The month with the most rainfall is December, when the rain falls for 18.5 days and typically aggregates up to 3.98" (101mm) of precipitation.
What is the month with the shortest days in Jefferson?
December has the shortest days of the year in Jefferson, Oregon, with an average of 8h and 54min of daylight.
Average temperature
Jefferson, OR
The warmest month (with the highest average high temperature) is August (81.9°F).
The month with the lowest average high temperature is December (45.5°F).
The month with the highest average low temperature is August (52.9°F).
The coldest month (with the lowest average low temperature) is December (34.5°F).
Average pressure
Jefferson, OR
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.08"Hg - Average pressure in March:
30.04"Hg - Average pressure in April:
30.07"Hg - Average pressure in May:
30.04"Hg - Average pressure in June:
30.04"Hg
- Average pressure in July:
30.04"Hg - Average pressure in August:
30.01"Hg - Average pressure in September:
30.01"Hg - Average pressure in October:
30.05"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.1"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed
Jefferson, OR
- Average wind speed in January:
5mph - Average wind speed in February:
5mph - Average wind speed in March:
5.1mph - Average wind speed in April:
4.8mph - Average wind speed in May:
4.3mph - Average wind speed in June:
4.3mph
- Average wind speed in July:
4.3mph - Average wind speed in August:
4mph - Average wind speed in September:
4.1mph - Average wind speed in October:
4.6mph - Average wind speed in November:
5mph - Average wind speed in December:
4.9mph
The windiest month (with the highest average wind speed) is March (5.1mph).
The calmest month (with the lowest average wind speed) is August (4mph).
Average humidity
Jefferson, OR
The months with the highest relative humidity are February and December (87%).
The month with the lowest relative humidity is August (66%).
Average rainfall
Jefferson, OR
- Average rainfall in January:
3.86" - Average rainfall in February:
2.99" - Average rainfall in March:
3.39" - Average rainfall in April:
2.6" - Average rainfall in May:
1.57" - Average rainfall in June:
1.14"
- Average rainfall in July:
0.24" - Average rainfall in August:
0.39" - Average rainfall in September:
1.34" - Average rainfall in October:
2.4" - Average rainfall in November:
3.07" - Average rainfall in December:
3.98"
The wettest month (with the highest rainfall) is December (3.98").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days
Jefferson, OR
- Average rainfall days in January:
17.7 days - Average rainfall days in February:
17 days - Average rainfall days in March:
20 days - Average rainfall days in April:
18.3 days - Average rainfall days in May:
12.4 days - Average rainfall days in June:
10.5 days
- Average rainfall days in July:
4 days - Average rainfall days in August:
3.9 days - Average rainfall days in September:
9.6 days - Average rainfall days in October:
14 days - Average rainfall days in November:
18.3 days - Average rainfall days in December:
18.5 days
The month with the highest number of rainy days is March (20 days).
The month with the least rainy days is August (3.9 days).
Average snowfall
Jefferson, OR
The month with the highest snowfall is February (1.3").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Jefferson, OR
- Average snowfall days in January:
0.8 days - Average snowfall days in February:
1.9 days - Average snowfall days in March:
1 days - Average snowfall days in April:
0 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:
0.1 days - Average snowfall days in December:
0.5 days
The month with the highest number of snowfall days is February (1.9 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Jefferson, OR
- Average daylight in January:
9h and 2min - Average daylight in February:
10h and 3min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 3min - Average daylight in May:
14h and 5min - Average daylight in June:
15h and 3min
- 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:
11h and 0min - Average daylight in November:
9h and 4min - Average daylight in December:
8h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in January:
4h and 2min - Average sunshine in February:
4h and 1min - Average sunshine in March:
5h and 4min - Average sunshine in April:
7h and 1min - Average sunshine in May:
8h and 3min - Average sunshine in June:
9h and 3min
- Average sunshine in July:
11h and 0min - Average sunshine in August:
11h and 1min - Average sunshine in September:
9h and 2min - Average sunshine in October:
5h and 4min - Average sunshine in November:
4h and 5min - Average sunshine in December:
4h and 2min
The month with the most sunshine is August (Average sunshine: 11h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).
Average sunshine days
Jefferson, OR
- Average sunshine days in January:
11.8 days - Average sunshine days in February:
9 days - Average sunshine days in March:
9.8 days - Average sunshine days in April:
10.1 days - Average sunshine days in May:
16.3 days - Average sunshine days in June:
17.5 days
- Average sunshine days in July:
25.7 days - Average sunshine days in August:
24.7 days - Average sunshine days in September:
19.1 days - Average sunshine days in October:
15.5 days - Average sunshine days in November:
10.9 days - Average sunshine days in December:
10.7 days
The month with the most sunshine days is July (25.7 days).
The month with the least sunshine days is February (9 days).
Average UV index
Jefferson, OR
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Jefferson, OR
The month with the most cloud cover is February (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility
Jefferson, OR
The months with the highest visibility are July, August and September (6mi).
The month with the lowest visibility is February (4mi).
Jefferson, Oregon, USA
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