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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 Riverside, Montana, is another subzero cold winter month, with an average temperature ranging between max 21.9°F (-5.6°C) and min 6.1°F (-14.4°C). In the transition from December to January, Riverside reports an average high-temperature of a still subzero cold 21.9°F (-5.6°C), indicating a close resemblance to the prior month. Weather in January »
Weather in February
February, the last month of the winter in Riverside, is another freezing cold month, with temperature in the range of an average high of 23°F (-5°C) and an average low of 7.2°F (-13.8°C). February brings a marginal elevation to a still subzero cold 23°F (-5°C) from January's 21.9°F (-5.6°C) in Riverside's average high-temperatures. Weather in February »
Weather in March
March, the first month of the spring in Riverside, is still a freezing cold month, with an average temperature fluctuating between 30°F (-1.1°C) and 14.4°F (-9.8°C). With the onset of March, the average high-temperature subtly transitions from a freezing cold 23°F (-5°C) in February to a still subzero cold 30°F (-1.1°C). Weather in March »
Weather in April
April in Riverside, Montana, is an icy spring month, with an average temperature ranging between max 37.2°F (2.9°C) and min 19.6°F (-6.9°C). Entering April, Riverside notices a subtle temperature elevation, with the average high-temperature advancing from March's freezing cold 30°F (-1.1°C) to a cold 37.2°F (2.9°C). Weather in April »
Weather in May
May, the last month of the spring in Riverside, is a frosty month, with an average temperature varying between 28.9°F (-1.7°C) and 49.8°F (9.9°C). With the arrival of May, the average high-temperature transitions from a cold 37.2°F (2.9°C) in April to a frosty 49.8°F (9.9°C). Weather in May »
Weather in June
The first month of the summer, June, is a refreshing month in Riverside, Montana, with an average temperature fluctuating between 37°F (2.8°C) and 61.9°F (16.6°C). Riverside's transition into June sees a rise in the average high-temperature, advancing from a chilly 49.8°F (9.9°C) in May to a refreshing 61.9°F (16.6°C). Weather in June »
Weather in July
July is a pleasant summer month in Riverside, Montana, with an average temperature fluctuating between 72.9°F (22.7°C) and 43.5°F (6.4°C). Riverside experiences its highest average temperatures in July, reaching a peak of 72.9°F (22.7°C) and a minimum of 43.5°F (6.4°C). Weather in July »
Weather in August
The last month of the summer, August, is another pleasant month in Riverside, Montana, with an average temperature fluctuating between 43.7°F (6.5°C) and 71.4°F (21.9°C). The commencement of August brings an average high-temperature of a still pleasant 71.4°F (21.9°C), marking an inconsequential divergence from July. Weather in August »
Weather in September
The first month of the autumn, September, is also an enjoyable month in Riverside, Montana, with temperature in the range of an average high of 61.9°F (16.6°C) and an average low of 37.6°F (3.1°C). Riverside's September weather shows a moderate shift in high-temperatures, falling from August's agreeable 71.4°F (21.9°C) to a refreshing 61.9°F (16.6°C). Weather in September »
Weather in October
October, like September, is a frosty autumn month in Riverside, Montana, with an average temperature ranging between min 26.1°F (-3.3°C) and max 44.2°F (6.8°C). A clear reduction in the average high-temperature marks the arrival of October, falling from a refreshing 61.9°F (16.6°C) in September to a frosty 44.2°F (6.8°C). Weather in October »
Weather in November
November, the last month of the autumn in Riverside, is another freezing cold month, with an average temperature varying between 14.2°F (-9.9°C) and 29.7°F (-1.3°C). With the onset of November, Riverside's average high-temperature witnesses a clear drop, receding from October's chilly 44.2°F (6.8°C) to a freezing cold 29.7°F (-1.3°C). Weather in November »
Weather in December
December, the first month of the winter in Riverside, is also a subzero cold month, with an average temperature varying between 20.1°F (-6.6°C) and 4.8°F (-15.1°C). The coldest period is December, when temperatures fluctuate between an average high of 20.1°F (-6.6°C) and a low of 4.8°F (-15.1°C). Weather in December »
Updated: Jul 8, 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, in Riverside, there are 109.2 rainfall days, and 23.15" (588mm) of precipitation is accumulated.
When does it snow in Riverside?
Months with snowfall are January through July, September through December.
How many days does it snow?
In Riverside, during the entire year, snow falls for 159.3 days and aggregates up to 120.47" (3060mm) of snow.
What is the month with the least sunshine?
The months with the least sunshine are January, February and December, with an average of 3.3h of sunshine.
What are the months with the lowest UV index?
The months with the lowest UV index are January through April, October through December, with an average maximum UV index of 1.
What is the most humid month?
With an average relative humidity of 95%, February is the most humid month.
When does it snow the most?
February is the month with the most snowfall. Snow falls for 23.2 days and accumulates 17.83" (453mm) of snow.
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 MST to MDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from MDT to MST.
What is the rainiest month?
The month with the most rainfall is May, when the rain falls for 17.4 days and typically aggregates up to 2.8" (71mm) of precipitation.
When are the longest days?
The month with the longest days is June, with an average of 15h and 30min of daylight.
What part of the year is the hottest?
July, with average temperatures reaching a high of 72.9°F (22.7°C) and a low of 43.5°F (6.4°C), is the warmest month.
What is the driest month?
July is the month with the least rainfall. Rain falls for 11.9 days and accumulates 0.91" (23mm) of precipitation.
What month has the most sunshine?
With an average of 11.8h of sunshine, July has the most sunshine of the year.
What is the month with the highest UV index?
With an average maximum UV index of 5, July is the month with the highest UV index.
What is the least humid month in Riverside?
The least humid month is August, with an average relative humidity of 50%.
When it does not snow?
August is the only month when snow does not fall.
What month is the coldest?
In Riverside, December registers the lowest temperatures, averaging 20.1°F (-6.6°C) at the peak and 4.8°F (-15.1°C) at the lowest.
What is the month with the shortest days?
With an average of 8h and 54min of daylight, December has the shortest days of the year in Riverside.
Average temperature
Riverside, MT
The warmest month (with the highest average high temperature) is July (72.9°F).
The month with the lowest average high temperature is December (20.1°F).
The month with the highest average low temperature is August (43.7°F).
The coldest month (with the lowest average low temperature) is December (4.8°F).
Average pressure
Riverside, MT
- Average pressure in January:
30.24"Hg - Average pressure in February:
30.14"Hg - Average pressure in March:
30.05"Hg - Average pressure in April:
29.97"Hg - Average pressure in May:
29.94"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
29.99"Hg - Average pressure in October:
30.06"Hg - Average pressure in November:
30.15"Hg - Average pressure in December:
30.23"Hg
The month with the highest atmospheric pressure is January (30.24"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Riverside, MT
- Average wind speed in January:
6.2mph - Average wind speed in February:
6.7mph - Average wind speed in March:
6.5mph - Average wind speed in April:
6.2mph - Average wind speed in May:
6mph - Average wind speed in June:
6.8mph
- Average wind speed in July:
6.2mph - Average wind speed in August:
5.8mph - Average wind speed in September:
6mph - Average wind speed in October:
6mph - Average wind speed in November:
6.2mph - Average wind speed in December:
6.2mph
The windiest month (with the highest average wind speed) is June (6.8mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).
Average humidity
Riverside, MT
The month with the highest relative humidity is February (95%).
The month with the lowest relative humidity is August (50%).
Average rainfall
Riverside, MT
- Average rainfall in January:
2.09" - Average rainfall in February:
2.44" - Average rainfall in March:
2.28" - Average rainfall in April:
2.6" - Average rainfall in May:
2.8" - Average rainfall in June:
2.2"
- Average rainfall in July:
0.91" - Average rainfall in August:
1.18" - Average rainfall in September:
1.57" - Average rainfall in October:
1.46" - Average rainfall in November:
1.65" - Average rainfall in December:
1.97"
The wettest month (with the highest rainfall) is May (2.8").
The driest month (with the least rainfall) is July (0.91").
Average rainfall days
Riverside, MT
- Average rainfall days in January:
2.2 days - Average rainfall days in February:
3.6 days - Average rainfall days in March:
6.6 days - Average rainfall days in April:
9.8 days - Average rainfall days in May:
17.4 days - Average rainfall days in June:
16.9 days
- Average rainfall days in July:
11.9 days - Average rainfall days in August:
12.3 days - Average rainfall days in September:
10.5 days - Average rainfall days in October:
9 days - Average rainfall days in November:
5 days - Average rainfall days in December:
4 days
The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (2.2 days).
Average snowfall
Riverside, MT
- Average snowfall in January:
17.36" - Average snowfall in February:
17.83" - Average snowfall in March:
17.64" - Average snowfall in April:
17.05" - Average snowfall in May:
8.23" - Average snowfall in June:
1.69"
- Average snowfall in July:
0.08" - Average snowfall in August:
0" - Average snowfall in September:
3.27" - Average snowfall in October:
7.32" - Average snowfall in November:
13.62" - Average snowfall in December:
16.38"
The month with the highest snowfall is February (17.83").
The month with the least snowfall is August (0").
Average snowfall days
Riverside, MT
- Average snowfall days in January:
22.8 days - Average snowfall days in February:
23.2 days - Average snowfall days in March:
24.4 days - Average snowfall days in April:
19.9 days - Average snowfall days in May:
10.3 days - Average snowfall days in June:
2.7 days
- Average snowfall days in July:
0.2 days - Average snowfall days in August:
0.2 days - Average snowfall days in September:
2.4 days - Average snowfall days in October:
10.7 days - Average snowfall days in November:
19 days - Average snowfall days in December:
23.5 days
The month with the highest number of snowfall days is March (24.4 days).
The months with the least snowfall days are July and August (0.2 days).
Average daylight / Average sunshine
Riverside, MT
- 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:
3h and 2min - Average sunshine in February:
3h and 2min - Average sunshine in March:
4h and 4min - Average sunshine in April:
7h and 1min - Average sunshine in May:
9h and 4min - Average sunshine in June:
10h and 4min
- Average sunshine in July:
11h and 5min - Average sunshine in August:
11h and 3min - Average sunshine in September:
9h and 5min - Average sunshine in October:
6h and 2min - Average sunshine in November:
5h and 0min - Average sunshine in December:
3h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The months with the least sunshine are January, February and December (Average sunshine: 3h and 18min).
Average sunshine days
Riverside, MT
- Average sunshine days in January:
8.6 days - Average sunshine days in February:
5.3 days - Average sunshine days in March:
6 days - Average sunshine days in April:
5.5 days - Average sunshine days in May:
5.5 days - Average sunshine days in June:
8.3 days
- Average sunshine days in July:
14.7 days - Average sunshine days in August:
13.9 days - Average sunshine days in September:
14.7 days - Average sunshine days in October:
14.5 days - Average sunshine days in November:
10.9 days - Average sunshine days in December:
8.2 days
The months with the most sunshine days are July and September (14.7 days).
The month with the least sunshine days is February (5.3 days).
Average UV index
Riverside, MT
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 1).
Average cloud cover
Riverside, MT
The month with the most cloud cover is February (Cloud cover 76).
The month with the least cloud cover is July (Cloud cover 16).
Average visibility
Riverside, MT
The months with the highest visibility are June, July, August and September (6mi).
The months with the lowest visibility are January, February, March and December (3mi).
Riverside, Montana, USA
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