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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, is another fresh winter month in O'Brien, Oregon, with an average temperature fluctuating between 41.4°F (5.2°C) and 51.6°F (10.9°C). With the advent of January, O'Brien experiences an average high-temperature of a still cool 51.6°F (10.9°C), mirroring a close resemblance to the previous month. Weather in January »
Weather in February
February, the last month of the winter in O'Brien, is also a fresh month, with temperature in the range of an average low of 40.5°F (4.7°C) and an average high of 50.9°F (10.5°C). The introduction of February sees an average high-temperature of a still cool 50.9°F (10.5°C), hardly deviating from January. Weather in February »
Weather in March
The first month of the spring, March, is also a fresh month in O'Brien, Oregon, with temperature in the range of an average high of 51.4°F (10.8°C) and an average low of 40.6°F (4.8°C). A minor adjustment in O'Brien's average high-temperature is noted with the start of March, touching a still cool 51.4°F (10.8°C) from February's 50.9°F (10.5°C). Weather in March »
Weather in April
April, like March, in O'Brien, Oregon, is another fresh spring month, with an average temperature ranging between max 55°F (12.8°C) and min 42.3°F (5.7°C). April's arrival shows an average high-temperature of a still fresh 55°F (12.8°C), hardly different from the previous month. Weather in April »
Weather in May
The last month of the spring, May, is a comfortable month in O'Brien, Oregon, with an average temperature varying between 60.8°F (16°C) and 45.5°F (7.5°C). The shift into May is accompanied by a modest temperature increase, with the average high-temperature edging up from a fresh 55°F (12.8°C) in April to a refreshing 60.8°F (16°C). Weather in May »
Weather in June
The first month of the summer, June, is also an enjoyable month in O'Brien, Oregon, with an average temperature fluctuating between 49.6°F (9.8°C) and 66°F (18.9°C). The initiation of June sees an average high-temperature of a still enjoyable 66°F (18.9°C), showing minor variations from the previous month. Weather in June »
Weather in July
July is an agreeable summer month in O'Brien, Oregon, with an average temperature varying between 71.8°F (22.1°C) and 53.6°F (12°C). With average high and low temperatures of 71.8°F (22.1°C) and 53.6°F (12°C) respectively, July is O'Brien's warmest month. Weather in July »
Weather in August
August, the last month of the summer in O'Brien, is also an agreeable month, with an average temperature varying between 71.4°F (21.9°C) and 53.2°F (11.8°C). O'Brien ushers in August with an average high-temperature of a still pleasant 71.4°F (21.9°C), showing a close resemblance to the previous month. Weather in August »
Weather in September
The first month of the autumn, September, is still a pleasant month in O'Brien, Oregon, with an average temperature fluctuating between 68.7°F (20.4°C) and 51.4°F (10.8°C). September denotes a minimal variation in the average high-temperature to a still pleasant 68.7°F (20.4°C) from August's 71.4°F (21.9°C). Weather in September »
Weather in October
October, like September, in O'Brien, Oregon, is another enjoyable autumn month, with an average temperature fluctuating between 62.6°F (17°C) and 48.2°F (9°C). October implies a soft temperature shift, with average high-temperatures reducing from September's agreeable 68.7°F (20.4°C) to a comfortable 62.6°F (17°C). Weather in October »
Weather in November
November, the last month of the autumn in O'Brien, is another cool month, with an average temperature ranging between max 54.7°F (12.6°C) and min 43.7°F (6.5°C). With the arrival of November, O'Brien experiences a modest decline in average high-temperatures, transitioning from a comfortable 62.6°F (17°C) in October to a cool 54.7°F (12.6°C). Weather in November »
Weather in December
December, the first month of the winter in O'Brien, is still a cool month, with temperature in the range of an average low of 40.6°F (4.8°C) and an average high of 50.4°F (10.2°C). O'Brien experiences its lowest temperatures in December, with an average peak of 50.4°F (10.2°C) and a low of 40.6°F (4.8°C). Weather in December »
Updated: Jun 4, 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 wettest month?
The month with the most rainfall is January, when the rain falls for 16.3 days and typically aggregates up to 8.11" (206mm) of precipitation.
How much does it rain?
In O'Brien, during the entire year, the rain falls for 131.8 days and collects up to 46.14" (1172mm) of precipitation.
When it does not snow?
January, March through December are months without snowfall.
How much does it snow?
Throughout the year, 0.59" (15mm) of snow is accumulated.
When does it snow in O'Brien?
The only month with snowfall is February.
When does it snow the most?
The month with the most snowfall is February, when snow falls for 0.3 days and typically aggregates up to 0.59" (15mm) of snow.
What is the month with the lowest UV index?
February and December, with an average maximum UV index of 2, are months with the lowest UV index.
What is the most humid month?
March is the most humid month, with an average relative humidity of 83%.
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 are the longest days in O'Brien?
June has the longest days of the year, with an average of 15h and 12min of daylight.
What are the months with the highest UV index?
The months with the highest UV index are June through August, with an average maximum UV index of 5.
What time of the year is the hottest in O'Brien?
July, characterized by an average high temperature of 71.8°F (22.1°C) and a low temperature of 53.6°F (12°C), is generally the warmest month.
What is the driest month?
The month with the least rainfall is July, when the rain falls for 2.3 days and typically collects 0.12" (3mm) of precipitation.
What month has the most sunshine?
July has the most sunshine of the year, with an average of 11.9h of sunshine.
What is the least humid month?
September is the least humid month, with an average relative humidity of 72%.
What is the coldest month?
The month of December, characterized by an average high of 50.4°F (10.2°C) and a low of 40.6°F (4.8°C), is recognized as the coldest.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 12min of daylight.
What is the month with the least sunshine?
The month with the least sunshine is December, with an average of 4.7h of sunshine.
Average temperature
O'Brien, OR
The warmest month (with the highest average high temperature) is July (71.8°F).
The month with the lowest average high temperature is December (50.4°F).
The month with the highest average low temperature is July (53.6°F).
The coldest month (with the lowest average low temperature) is February (40.5°F).
Average pressure
O'Brien, OR
- Average pressure in January:
30.12"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
30.09"Hg - Average pressure in May:
30.04"Hg - Average pressure in June:
30.03"Hg
- Average pressure in July:
30.01"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
30"Hg - Average pressure in October:
30.05"Hg - Average pressure in November:
30.08"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is August (29.99"Hg).
Average wind speed
O'Brien, OR
- Average wind speed in January:
7.5mph - Average wind speed in February:
7.8mph - Average wind speed in March:
8.2mph - Average wind speed in April:
7.6mph - Average wind speed in May:
7.1mph - Average wind speed in June:
7.7mph
- Average wind speed in July:
6.6mph - Average wind speed in August:
5.6mph - Average wind speed in September:
6mph - Average wind speed in October:
6.7mph - Average wind speed in November:
7.1mph - Average wind speed in December:
7.8mph
The windiest month (with the highest average wind speed) is March (8.2mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity
O'Brien, OR
The month with the highest relative humidity is March (83%).
The month with the lowest relative humidity is September (72%).
Average rainfall
O'Brien, OR
- Average rainfall in January:
8.11" - Average rainfall in February:
6.69" - Average rainfall in March:
7.09" - Average rainfall in April:
4.02" - Average rainfall in May:
2.56" - Average rainfall in June:
0.91"
- Average rainfall in July:
0.12" - Average rainfall in August:
0.24" - Average rainfall in September:
1.18" - Average rainfall in October:
3.23" - Average rainfall in November:
4.57" - Average rainfall in December:
7.44"
The wettest month (with the highest rainfall) is January (8.11").
The driest month (with the least rainfall) is July (0.12").
Average rainfall days
O'Brien, OR
- Average rainfall days in January:
16.3 days - Average rainfall days in February:
14.8 days - Average rainfall days in March:
19.2 days - Average rainfall days in April:
14.5 days - Average rainfall days in May:
9.8 days - Average rainfall days in June:
5.9 days
- Average rainfall days in July:
2.3 days - Average rainfall days in August:
2.8 days - Average rainfall days in September:
5.7 days - Average rainfall days in October:
9.9 days - Average rainfall days in November:
13.6 days - Average rainfall days in December:
17 days
The month with the highest number of rainy days is March (19.2 days).
The month with the least rainy days is July (2.3 days).
Average snowfall
O'Brien, OR
The month with the highest snowfall is February (0.59").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days
O'Brien, OR
- Average snowfall days in January:
0 days - Average snowfall days in February:
0.3 days - Average snowfall days in March:
0 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 days - Average snowfall days in December:
0.1 days
The month with the highest number of snowfall days is February (0.3 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October and November (0 days).
Average daylight / Average sunshine
O'Brien, OR
- Average daylight in January:
9h and 3min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 4min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
4h and 5min - Average sunshine in February:
5h and 0min - Average sunshine in March:
6h and 1min - Average sunshine in April:
8h and 4min - Average sunshine in May:
10h and 0min - Average sunshine in June:
10h and 5min
- Average sunshine in July:
11h and 5min - Average sunshine in August:
11h and 4min - Average sunshine in September:
10h and 0min - Average sunshine in October:
6h and 3min - Average sunshine in November:
5h and 3min - Average sunshine in December:
4h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 4h and 42min).
Average sunshine days
O'Brien, OR
- Average sunshine days in January:
13.6 days - Average sunshine days in February:
11.9 days - Average sunshine days in March:
10.5 days - Average sunshine days in April:
13.3 days - Average sunshine days in May:
19.8 days - Average sunshine days in June:
22.2 days
- Average sunshine days in July:
27.7 days - Average sunshine days in August:
26.3 days - Average sunshine days in September:
23.4 days - Average sunshine days in October:
20.2 days - Average sunshine days in November:
14.6 days - Average sunshine days in December:
13 days
The month with the most sunshine days is July (27.7 days).
The month with the least sunshine days is March (10.5 days).
Average UV index
O'Brien, OR
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are February and December (UV index 2).
Average cloud cover
O'Brien, OR
The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 10).
Average visibility
O'Brien, 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).
O'Brien, Oregon, USA
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