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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 Foster, Oregon, is another chilly winter month, with an average temperature varying between 46.9°F (8.3°C) and 34.3°F (1.3°C). As January takes hold, the average high-temperature is a still chilly 46.9°F (8.3°C), nearly mirroring that of the previous month. Weather in January »
Weather in February
The last month of the winter, February, is another chilly month in Foster, Oregon, with an average temperature fluctuating between 47.3°F (8.5°C) and 33.8°F (1°C). The commencement of February brings an average high-temperature of a still chilly 47.3°F (8.5°C), marking an inconsequential divergence from January. Weather in February »
Weather in March
The first month of the spring, March, is a cool month in Foster, Oregon, with temperature in the range of an average low of 35.1°F (1.7°C) and an average high of 50.2°F (10.1°C). Foster experiences a transition to a cool 50.2°F (10.1°C) in average high-temperatures with the arrival of March, not greatly differing from February's 47.3°F (8.5°C). Weather in March »
Weather in April
April is a refreshing spring month in Foster, Oregon, with an average temperature ranging between min 36.9°F (2.7°C) and max 55.9°F (13.3°C). April introduces a marginal temperature uplift, with average high-temperatures adjusting from March's cool 50.2°F (10.1°C) to a mild 55.9°F (13.3°C). Weather in April »
Weather in May
The last month of the spring, May, is a comfortable month in Foster, Oregon, with an average temperature ranging between min 40.6°F (4.8°C) and max 63.9°F (17.7°C). May's arrival signals a modest temperature shift, moving from a moderate 55.9°F (13.3°C) in April to a still refreshing 63.9°F (17.7°C). Weather in May »
Weather in June
June, the first month of the summer in Foster, is an agreeable month, with an average temperature varying between 69.4°F (20.8°C) and 44.2°F (6.8°C). The transition from May to June brings a subtle temperature rise, with average high-temperatures increasing from a refreshing 63.9°F (17.7°C) to an agreeable 69.4°F (20.8°C). Weather in June »
Weather in July
July in Foster, Oregon, is a warm summer month, with temperature in the range of an average high of 78.4°F (25.8°C) and an average low of 48°F (8.9°C). The shift from June to July sees an increase in the average high-temperature, transitioning from a pleasant 69.4°F (20.8°C) to a moderately hot 78.4°F (25.8°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Foster, Oregon, with an average temperature fluctuating between 79.5°F (26.4°C) and 49.8°F (9.9°C). The highest temperatures are recorded in August, with averages reaching a high of 79.5°F (26.4°C) and a low of 49.8°F (9.9°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a pleasant month in Foster, Oregon, with an average temperature fluctuating between 72.3°F (22.4°C) and 47.3°F (8.5°C). September indicates a minor shift in the average high-temperature, from August's moderately hot 79.5°F (26.4°C) to a pleasant 72.3°F (22.4°C). Weather in September »
Weather in October
October, like September, in Foster, Oregon, is another enjoyable autumn month, with temperature in the range of an average high of 61.5°F (16.4°C) and an average low of 42.8°F (6°C). The start of October comes with a reduction in the average high-temperature, receding from a pleasant 72.3°F (22.4°C) in September to an enjoyable 61.5°F (16.4°C). Weather in October »
Weather in November
The last month of the autumn, November, is another cool month in Foster, Oregon, with an average temperature fluctuating between 38.1°F (3.4°C) and 50.7°F (10.4°C). As October transitions to November, the average high-temperature falls from a comfortable 61.5°F (16.4°C) to a fresh 50.7°F (10.4°C). Weather in November »
Weather in December
The first month of the winter, December, is still a chilly month in Foster, Oregon, with an average temperature ranging between min 32.9°F (0.5°C) and max 44.4°F (6.9°C). Foster's coldest month, December, registers temperatures that range from a high of 44.4°F (6.9°C) to a low of 32.9°F (0.5°C). Weather in December »
Updated: Jun 25, 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
How much does it rain?
In Foster, during the entire year, the rain falls for 167.6 days and collects up to 36.54" (928mm) of precipitation.
When does it snow?
January through April, November and December are months with snowfall.
How much does it snow?
In Foster, during the entire year, snow falls for 7.9 days and aggregates up to 7.76" (197mm) of snow.
What are the most humid months in Foster?
February, March and December, with an average relative humidity of 86%, are most humid months.
When does it snow the most?
February is the month with the most snowfall in Foster. Snow falls for 3.4 days and accumulates 3.7" (94mm) of snow.
What is the month with the least sunshine?
With an average of 4.1h of sunshine, February has the least sunshine of the year.
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?
May through October are months without snowfall.
When are the longest days in Foster?
With an average of 15h and 30min of daylight, June has the longest days of the year.
What is the driest month?
July is the month with the least rainfall. Rain falls for 4.1 days and accumulates 0.24" (6mm) of precipitation.
When is the highest UV index in Foster?
With an average maximum UV index of 6, July is the month with the highest UV index.
What part of the year is the hottest?
In Foster, August is identified by the average highest temperatures, reaching a peak of 79.5°F (26.4°C) and a low of 49.8°F (9.9°C).
What is the least humid month?
With an average relative humidity of 66%, August is the least humid month.
What month has the most sunshine?
With an average of 11.3h of sunshine, August has the most sunshine of the year in Foster.
What is the month with the lowest UV index?
November is the month with the lowest UV index, with an average maximum UV index of 1.
What are the coldest months?
December, recording an average high temperature of 44.4°F (6.9°C) and a low temperature of 32.9°F (0.5°C), is Foster's coldest month.
What is the wettest month?
December is the month with the most rainfall. Rain falls for 18.9 days and accumulates 5.47" (139mm) of precipitation.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 8h and 54min of daylight.
Average temperature
Foster, OR
The warmest month (with the highest average high temperature) is August (79.5°F).
The month with the lowest average high temperature is December (44.4°F).
The month with the highest average low temperature is August (49.8°F).
The coldest month (with the lowest average low temperature) is December (32.9°F).
Average pressure
Foster, OR
- Average pressure in January:
30.12"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.04"Hg - Average pressure in April:
30.07"Hg - Average pressure in May:
30.03"Hg - Average pressure in June:
30.03"Hg
- Average pressure in July:
30.03"Hg - Average pressure in August:
30"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:
30.11"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed
Foster, OR
- Average wind speed in January:
5.1mph - Average wind speed in February:
4.8mph - Average wind speed in March:
4.9mph - Average wind speed in April:
4.5mph - Average wind speed in May:
4.1mph - Average wind speed in June:
4mph
- Average wind speed in July:
3.9mph - Average wind speed in August:
3.7mph - Average wind speed in September:
3.9mph - Average wind speed in October:
4.3mph - Average wind speed in November:
5mph - Average wind speed in December:
5mph
The windiest month (with the highest average wind speed) is January (5.1mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity
Foster, OR
The months with the highest relative humidity are February, March and December (86%).
The month with the lowest relative humidity is August (66%).
Average rainfall
Foster, OR
- Average rainfall in January:
4.92" - Average rainfall in February:
4.45" - Average rainfall in March:
4.49" - Average rainfall in April:
4.06" - Average rainfall in May:
2.17" - Average rainfall in June:
1.5"
- Average rainfall in July:
0.24" - Average rainfall in August:
0.31" - Average rainfall in September:
1.61" - Average rainfall in October:
3.23" - Average rainfall in November:
4.09" - Average rainfall in December:
5.47"
The wettest month (with the highest rainfall) is December (5.47").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days
Foster, OR
- Average rainfall days in January:
17.4 days - Average rainfall days in February:
17.8 days - Average rainfall days in March:
21.1 days - Average rainfall days in April:
18.7 days - Average rainfall days in May:
13.8 days - Average rainfall days in June:
10.7 days
- Average rainfall days in July:
4.1 days - Average rainfall days in August:
4.2 days - Average rainfall days in September:
9 days - Average rainfall days in October:
14.1 days - Average rainfall days in November:
17.8 days - Average rainfall days in December:
18.9 days
The month with the highest number of rainy days is March (21.1 days).
The month with the least rainy days is July (4.1 days).
Average snowfall
Foster, OR
The month with the highest snowfall is February (3.7").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Foster, OR
- Average snowfall days in January:
1.5 days - Average snowfall days in February:
3.4 days - Average snowfall days in March:
1.6 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:
0.1 days - Average snowfall days in December:
1 days
The month with the highest number of snowfall days is February (3.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Foster, 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 2min - Average sunshine in April:
7h and 0min - Average sunshine in May:
8h and 2min - Average sunshine in June:
9h and 2min
- Average sunshine in July:
11h and 1min - Average sunshine in August:
11h and 2min - Average sunshine in September:
9h and 3min - 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 18min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).
Average sunshine days
Foster, OR
- Average sunshine days in January:
12.3 days - Average sunshine days in February:
8.4 days - Average sunshine days in March:
8.6 days - Average sunshine days in April:
9.8 days - Average sunshine days in May:
15.6 days - Average sunshine days in June:
17.4 days
- Average sunshine days in July:
25.7 days - Average sunshine days in August:
24.8 days - Average sunshine days in September:
19.3 days - Average sunshine days in October:
15.9 days - Average sunshine days in November:
11 days - Average sunshine days in December:
11 days
The month with the most sunshine days is July (25.7 days).
The month with the least sunshine days is February (8.4 days).
Average UV index
Foster, OR
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is November (UV index 1).
Average cloud cover
Foster, OR
The months with the most cloud cover are February and March (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 19).
Average visibility
Foster, OR
The month with the highest visibility is August (6mi).
The months with the lowest visibility are February and April (4mi).
Foster, Oregon, USA
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