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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, like December, is another chilly winter month in Monmouth, Oregon, with an average temperature varying between 35.1°F (1.7°C) and 46.9°F (8.3°C). The beginning of January reveals an average high-temperature of a still chilly 46.9°F (8.3°C), showing minimal deviation from the previous month. Weather in January »
Weather in February
February, the last month of the winter in Monmouth, is another chilly month, with an average temperature ranging between min 35.1°F (1.7°C) and max 48.2°F (9°C). Monmouth, Oregon, observes a minor difference in average high-temperatures between January's 46.9°F (8.3°C) and February's 48.2°F (9°C). Weather in February »
Weather in March
March, the first month of the spring in Monmouth, is a fresh month, with an average temperature ranging between max 52°F (11.1°C) and min 36.9°F (2.7°C). March's onset brings an average high-temperature of a cool 52°F (11.1°C), showing a minute difference from February's 48.2°F (9°C). Weather in March »
Weather in April
April is a refreshing spring month in Monmouth, Oregon, with an average temperature varying between 38.3°F (3.5°C) and 57.7°F (14.3°C). In Monmouth, the average high-temperature in April slightly increases from a cool 52°F (11.1°C) in March to a mild 57.7°F (14.3°C). Weather in April »
Weather in May
May, the last month of the spring in Monmouth, is a refreshing month, with temperature in the range of an average high of 65.8°F (18.8°C) and an average low of 42.4°F (5.8°C). A soft shift in the average high-temperature is noticeable in May, transitioning from a refreshing 57.7°F (14.3°C) in April to a comfortable 65.8°F (18.8°C). Weather in May »
Weather in June
The first month of the summer, June, is an agreeable month in Monmouth, Oregon, with temperature in the range of an average high of 70.9°F (21.6°C) and an average low of 46.8°F (8.2°C). June's commencement is accompanied by an average high-temperature of a pleasant 70.9°F (21.6°C), diverging marginally from May's 65.8°F (18.8°C). Weather in June »
Weather in July
July in Monmouth, Oregon, is a warm summer month, with an average temperature ranging between max 79.2°F (26.2°C) and min 51.3°F (10.7°C). With the onset of July, Monmouth experiences a subtle temperature shift, with the average high-temperature moving from a pleasant 70.9°F (21.6°C) in June to a moderately hot 79.2°F (26.2°C). Weather in July »
Weather in August
August, the last month of the summer in Monmouth, is also a moderately hot month, with an average temperature ranging between max 80.8°F (27.1°C) and min 52.5°F (11.4°C). Monmouth's August weather reaches an average high of 80.8°F (27.1°C) and an average low of 52.5°F (11.4°C), making it the warmest month. August's average heat index is estimated at 84.2°F (29°C). Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Monmouth, Oregon, with an average temperature ranging between max 73.8°F (23.2°C) and min 50°F (10°C). September is marked by a subtle drop in average high-temperatures, transitioning from a moderately hot 80.8°F (27.1°C) in August to a still warm 73.8°F (23.2°C). Weather in September »
Weather in October
October, the same as September, is another comfortable autumn month in Monmouth, Oregon, with an average temperature varying between 44.1°F (6.7°C) and 61.7°F (16.5°C). Monmouth experiences a temperature shift at the start of October, with average high-temperatures adjusting from a moderately hot 73.8°F (23.2°C) in September to a comfortable 61.7°F (16.5°C). Weather in October »
Weather in November
The last month of the autumn, November, is another cool month in Monmouth, Oregon, with an average temperature ranging between max 50.9°F (10.5°C) and min 39°F (3.9°C). Monmouth's progression into November includes a drop in the average high-temperature, from a comfortable 61.7°F (16.5°C) in October to a cool 50.9°F (10.5°C). Weather in November »
Weather in December
The first month of the winter, December, is still a chilly month in Monmouth, Oregon, with an average temperature fluctuating between 34.2°F (1.2°C) and 44.2°F (6.8°C). December is the coldest month, with the temperature often reaching an average high of 44.2°F (6.8°C) and an average low of 34.2°F (1.2°C). Weather in December »
Updated: Jun 14, 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 many days does it rain?
Throughout the year, there are 144.6 rainfall days, and 10.04" (255mm) of precipitation is accumulated.
When does it snow?
January through March and December are months with snowfall.
How many days does it snow?
In Monmouth, during the entire year, snow falls for 4.5 days and aggregates up to 0.91" (23mm) of snow.
When is the lowest UV index?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
What is the most humid month?
The months with the highest humidity are February and December, with an average relative humidity of 88%.
When does it snow the most?
The month with the most snowfall is February, when snow falls for 1.8 days and typically aggregates up to 0.55" (14mm) of snow.
What is the month with the least sunshine?
The month with the least sunshine is February, with an average of 4h of sunshine.
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 Monmouth, snow does not fall in April through November.
When are the longest days?
With an average of 15h and 30min of daylight, June has the longest days of the year.
When is the highest UV index?
June through August, with an average maximum UV index of 5, are months with the highest UV index.
What is the driest month?
July is the month with the least rainfall. Rain falls for 4.3 days and accumulates 0.12" (3mm) of precipitation.
What is the month with the most sunshine?
The months with the most sunshine are July and August, with an average of 10.9h of sunshine.
What time of the year is the hottest?
Monmouth's warmest weather arrives in August, when temperatures average a high of 80.8°F (27.1°C) and a low of 52.5°F (11.4°C).
What is the least humid month?
August is the least humid month, with an average relative humidity of 68%.
What is the coldest time of year?
December is the coldest month, with an average high-temperature of 44.2°F (6.8°C) and an average low-temperature of 34.2°F (1.2°C).
What is the rainiest month in Monmouth?
The month with the most rainfall is December, when the rain falls for 16.5 days and typically aggregates up to 1.54" (39mm) 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
Monmouth, OR
The warmest month (with the highest average high temperature) is August (80.8°F).
The month with the lowest average high temperature is December (44.2°F).
The month with the highest average low temperature is August (52.5°F).
The coldest month (with the lowest average low temperature) is December (34.2°F).
Average pressure
Monmouth, OR
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.08"Hg - Average pressure in March:
30.03"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:
30.05"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:
30.06"Hg - Average pressure in December:
30.09"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
Monmouth, OR
- Average wind speed in January:
4.9mph - Average wind speed in February:
4.9mph - 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:
4.2mph
- Average wind speed in July:
4.2mph - Average wind speed in August:
3.9mph - Average wind speed in September:
4mph - Average wind speed in October:
4.5mph - Average wind speed in November:
4.9mph - Average wind speed in December:
4.7mph
The windiest month (with the highest average wind speed) is March (5.1mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity
Monmouth, OR
The months with the highest relative humidity are February and December (88%).
The month with the lowest relative humidity is August (68%).
Average rainfall
Monmouth, OR
- Average rainfall in January:
1.38" - Average rainfall in February:
1.22" - Average rainfall in March:
1.22" - Average rainfall in April:
0.91" - Average rainfall in May:
0.63" - Average rainfall in June:
0.43"
- Average rainfall in July:
0.12" - Average rainfall in August:
0.24" - Average rainfall in September:
0.43" - Average rainfall in October:
0.87" - Average rainfall in November:
1.06" - Average rainfall in December:
1.54"
The wettest month (with the highest rainfall) is December (1.54").
The driest month (with the least rainfall) is July (0.12").
Average rainfall days
Monmouth, OR
- Average rainfall days in January:
16.2 days - Average rainfall days in February:
15.2 days - Average rainfall days in March:
17.8 days - Average rainfall days in April:
15 days - Average rainfall days in May:
11 days - Average rainfall days in June:
8.3 days
- Average rainfall days in July:
4.3 days - Average rainfall days in August:
4 days - Average rainfall days in September:
7.8 days - Average rainfall days in October:
12.4 days - Average rainfall days in November:
16.1 days - Average rainfall days in December:
16.5 days
The month with the highest number of rainy days is March (17.8 days).
The month with the least rainy days is August (4 days).
Average snowfall
Monmouth, OR
The month with the highest snowfall is February (0.55").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days
Monmouth, OR
- Average snowfall days in January:
1 days - Average snowfall days in February:
1.8 days - Average snowfall days in March:
0.8 days - Average snowfall days in April:
0.1 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:
0.2 days - Average snowfall days in December:
0.6 days
The month with the highest number of snowfall days is February (1.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Monmouth, 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:
10h and 5min - 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 1min - Average sunshine in February:
4h and 0min - Average sunshine in March:
5h and 2min - Average sunshine in April:
7h and 1min - Average sunshine in May:
8h and 3min - Average sunshine in June:
9h and 2min
- Average sunshine in July:
10h and 5min - Average sunshine in August:
10h and 5min - Average sunshine in September:
9h and 1min - Average sunshine in October:
5h and 2min - Average sunshine in November:
4h and 4min - Average sunshine in December:
4h and 1min
The months with the most sunshine are July and August (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 0min).
Average sunshine days
Monmouth, OR
- Average sunshine days in January:
11.4 days - Average sunshine days in February:
9.8 days - Average sunshine days in March:
9.7 days - Average sunshine days in April:
11.2 days - Average sunshine days in May:
16.8 days - Average sunshine days in June:
18.4 days
- Average sunshine days in July:
24.9 days - Average sunshine days in August:
24.2 days - Average sunshine days in September:
19.1 days - Average sunshine days in October:
14.5 days - Average sunshine days in November:
11.2 days - Average sunshine days in December:
11.5 days
The month with the most sunshine days is July (24.9 days).
The month with the least sunshine days is March (9.7 days).
Average UV index
Monmouth, OR
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Monmouth, OR
The months with the most cloud cover are February and March (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility
Monmouth, OR
The month with the highest visibility is August (6mi).
The months with the lowest visibility are January, February, March, April, November and December (4mi).
Monmouth, Oregon, USA
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