Climate and monthly weather forecastRiverside, OR
Climate and monthly weather forecast
Weather in January
January is a cold winter month in Riverside, Oregon, with an average temperature fluctuating between 19.2°F (-7.1°C) and 32.7°F (0.4°C). Riverside's average high-temperature in January sits at a cold 32.7°F (0.4°C), showing little difference from the previous month. Weather in January »Weather in February
The last month of the winter, February, is also an icy month in Riverside, Oregon, with an average temperature fluctuating between 23.2°F (-4.9°C) and 36.1°F (2.3°C). In February, the average high-temperature registers at a still cold 36.1°F (2.3°C), nearly identical to January's 32.7°F (0.4°C). Weather in February »Weather in March
March, the first month of the spring in Riverside, is a frosty month, with an average temperature varying between 44.4°F (6.9°C) and 29.7°F (-1.3°C). With the onset of March, the average high-temperature subtly transitions from an icy 36.1°F (2.3°C) in February to a frosty 44.4°F (6.9°C). Weather in March »Weather in April
April in Riverside, Oregon, is a fresh spring month, with an average temperature varying between 34°F (1.1°C) and 53.2°F (11.8°C). April's onset is marked by a subtle temperature increase, moving from a chilly 44.4°F (6.9°C) in March to a cool 53.2°F (11.8°C). Weather in April »Weather in May
May, the last month of the spring in Riverside, is a refreshing month, with an average temperature varying between 41.9°F (5.5°C) and 63.5°F (17.5°C). Riverside's weather shows a temperature rise with the arrival of May, moving from a fresh 53.2°F (11.8°C) in April to a comfortable 63.5°F (17.5°C). Weather in May »Weather in June
June, the first month of the summer in Riverside, is an agreeable month, with temperature in the range of an average low of 49.3°F (9.6°C) and an average high of 72.7°F (22.6°C). With the arrival of June, the average high-temperature transitions from a refreshing 63.5°F (17.5°C) in May to a pleasant 72.7°F (22.6°C). Weather in June »Weather in July
July in Riverside, Oregon, is a warm summer month, with an average temperature ranging between min 58.8°F (14.9°C) and max 85.3°F (29.6°C). In Riverside, July is the month with the highest recorded average temperatures, measuring a high of 85.3°F (29.6°C) and a low of 58.8°F (14.9°C). Weather in July »Weather in August
August, the last month of the summer in Riverside, is also a moderately hot month, with an average temperature ranging between max 83.5°F (28.6°C) and min 59°F (15°C). The dawn of August sees an average high-temperature of a still moderately hot 83.5°F (28.6°C), subtly contrasting with July's 85.3°F (29.6°C). Weather in August »Weather in September
September, the first month of the autumn in Riverside, is still a pleasant month, with an average temperature ranging between max 73°F (22.8°C) and min 51.8°F (11°C). The arrival of September corresponds with a reduction in the average high-temperature, down from August's moderately hot 83.5°F (28.6°C) to an agreeable 73°F (22.8°C). Weather in September »Weather in October
October, like September, is a moderate autumn month in Riverside, Oregon, with an average temperature fluctuating between 56.8°F (13.8°C) and 39.7°F (4.3°C). The arrival of October brings a significant change in Riverside's weather, with average high-temperatures dropping from September's agreeable 73°F (22.8°C) to a refreshing 56.8°F (13.8°C). Weather in October »Weather in November
November, the last month of the autumn in Riverside, is also an icy month, with an average temperature fluctuating between 42.6°F (5.9°C) and 28.8°F (-1.8°C). November's arrival corresponds with a decrease in average high-temperatures, from October's refreshing 56.8°F (13.8°C) to an icy 42.6°F (5.9°C). Weather in November »Weather in December
December, the first month of the winter in Riverside, is still a freezing cold month, with an average temperature varying between 31.8°F (-0.1°C) and 19.4°F (-7°C). The coldest month is December, with an average high-temperature of 31.8°F (-0.1°C) and an average low-temperature of 19.4°F (-7°C). 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
The most humid month in Riverside is January, with an average relative humidity of 85%.
In Riverside, during the entire year, the rain falls for 109.9 days and collects up to 11.34" (288mm) of precipitation.
Months with snowfall are January through May, November and December.
In Riverside, during the entire year, snow falls for 46.8 days and aggregates up to 25.75" (654mm) of snow.
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from MST to MDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from MDT to MST.
In Riverside, snow does not fall in June through October.
The month with the longest days is June, with an average of 15h and 24min of daylight.
Temperature records mark July as the warmest month, with highs averaging 85.3°F (29.6°C) and lows at 58.8°F (14.9°C).
July and August, with an average relative humidity of 31%, are the least humid months.
July is the month with the least rainfall. Rain falls for 3.4 days and accumulates 0.12" (3mm) of precipitation.
The month with the most sunshine in Riverside is July, with an average of 12h of sunshine.
The month with the highest UV index is July, with an average maximum UV index of 7.
December tends to be the coldest month, with temperatures averaging a daily high of 31.8°F (-0.1°C) and a low of 19.4°F (-7°C).
The month with the most rainfall is December, when the rain falls for 9.3 days and typically aggregates up to 1.77" (45mm) of precipitation.
The month with the most snowfall is December, when snow falls for 13.1 days and typically aggregates up to 9.13" (232mm) of snow.
December has the shortest days of the year, with an average of 9h and 0min of daylight.
With an average of 5.1h of sunshine, December has the least sunshine of the year.
Average temperature
Riverside, OR
The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is December (31.8°F).
The month with the highest average low temperature is August (59°F).
The coldest month (with the lowest average low temperature) is January (19.2°F).
Average pressure
Riverside, OR
- Average pressure in January:
30.23"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.04"Hg - Average pressure in April:
30.01"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.94"Hg - Average pressure in August:
29.93"Hg - Average pressure in September:
29.96"Hg - Average pressure in October:
30.05"Hg - Average pressure in November:
30.13"Hg - Average pressure in December:
30.2"Hg
The month with the highest atmospheric pressure is January (30.23"Hg).
The months with the lowest atmospheric pressure are June and August (29.93"Hg).
Average wind speed
Riverside, OR
- Average wind speed in January:
5mph - Average wind speed in February:
6.3mph - Average wind speed in March:
7.3mph - Average wind speed in April:
7.8mph - Average wind speed in May:
7.3mph - Average wind speed in June:
7.4mph
- Average wind speed in July:
7mph - Average wind speed in August:
6.6mph - Average wind speed in September:
6.4mph - Average wind speed in October:
6.3mph - Average wind speed in November:
5.8mph - Average wind speed in December:
5.4mph
The windiest month (with the highest average wind speed) is April (7.8mph).
The calmest month (with the lowest average wind speed) is January (5mph).
Average humidity
Riverside, OR
The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are July and August (31%).
Average rainfall
Riverside, OR
- Average rainfall in January:
1.46" - Average rainfall in February:
1.26" - Average rainfall in March:
1.46" - Average rainfall in April:
0.94" - Average rainfall in May:
1.26" - Average rainfall in June:
0.63"
- Average rainfall in July:
0.12" - Average rainfall in August:
0.2" - Average rainfall in September:
0.59" - Average rainfall in October:
0.71" - Average rainfall in November:
0.94" - Average rainfall in December:
1.77"
The wettest month (with the highest rainfall) is December (1.77").
The driest month (with the least rainfall) is July (0.12").
Average rainfall days
Riverside, OR
- Average rainfall days in January:
9.7 days - Average rainfall days in February:
9.6 days - Average rainfall days in March:
15.3 days - Average rainfall days in April:
13.7 days - Average rainfall days in May:
12.6 days - Average rainfall days in June:
8.1 days
- Average rainfall days in July:
3.4 days - Average rainfall days in August:
3.8 days - Average rainfall days in September:
5.5 days - Average rainfall days in October:
9.5 days - Average rainfall days in November:
9.4 days - Average rainfall days in December:
9.3 days
The month with the highest number of rainy days is March (15.3 days).
The month with the least rainy days is July (3.4 days).
Average snowfall
Riverside, OR
- Average snowfall in January:
6.1" - Average snowfall in February:
5.55" - Average snowfall in March:
1.81" - Average snowfall in April:
0.35" - Average snowfall in May:
0.04" - Average snowfall in June:
0"
The month with the highest snowfall is December (9.13").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days
Riverside, OR
- Average snowfall days in January:
11.1 days - Average snowfall days in February:
9.8 days - Average snowfall days in March:
5.8 days - Average snowfall days in April:
1.5 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 days - Average snowfall days in October:
0.4 days - Average snowfall days in November:
4.9 days - Average snowfall days in December:
13.1 days
The month with the highest number of snowfall days is December (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Riverside, OR
- Average daylight in January:
9h and 24min - Average daylight in February:
10h and 30min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 30min - Average daylight in May:
14h and 42min - Average daylight in June:
15h and 24min
- Average daylight in July:
15h and 0min - Average daylight in August:
13h and 54min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 42min - Average daylight in December:
9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in January:
5h and 12min - Average sunshine in February:
6h and 48min - Average sunshine in March:
7h and 54min - Average sunshine in April:
9h and 12min - Average sunshine in May:
11h and 0min - Average sunshine in June:
11h and 36min
- Average sunshine in July:
12h and 0min - Average sunshine in August:
11h and 0min - Average sunshine in September:
9h and 30min - Average sunshine in October:
8h and 18min - Average sunshine in November:
6h and 24min - Average sunshine in December:
5h and 6min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days
Riverside, OR
- Average sunshine days in January:
15.7 days - Average sunshine days in February:
12.6 days - Average sunshine days in March:
11.5 days - Average sunshine days in April:
14.4 days - Average sunshine days in May:
16.6 days - Average sunshine days in June:
18.9 days
- Average sunshine days in July:
25.3 days - Average sunshine days in August:
23.6 days - Average sunshine days in September:
22.1 days - Average sunshine days in October:
19.8 days - Average sunshine days in November:
16.8 days - Average sunshine days in December:
14.8 days
The month with the most sunshine days is July (25.3 days).
The month with the least sunshine days is March (11.5 days).
Average UV index
Riverside, OR
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover
Riverside, OR
The months with the most cloud cover are January and December (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 8).
Average visibility
Riverside, OR
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
