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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 a freezing cold winter month in Simpson, Montana, with an average temperature ranging between max 27.1°F (-2.7°C) and min 14.4°F (-9.8°C). Simpson's coldest months, January and December, record an average high-temperature of 27.1°F (-2.7°C). Weather in January »
Weather in February
February, the last month of the winter in Simpson, is another freezing cold month, with temperature in the range of an average high of 27.7°F (-2.4°C) and an average low of 13.5°F (-10.3°C). The average high-temperature is a still freezing cold 27.7°F (-2.4°C) in February, hardly different from the 27.1°F (-2.7°C) recorded in January. Weather in February »
Weather in March
The first month of the spring, March, is an icy month in Simpson, Montana, with an average temperature varying between 24.6°F (-4.1°C) and 39.7°F (4.3°C). March marks a rise in the average high-temperature, moving from February's freezing cold 27.7°F (-2.4°C) to a cold 39.7°F (4.3°C). Weather in March »
Weather in April
April in Simpson, Montana, is a cool spring month, with an average temperature ranging between max 53.2°F (11.8°C) and min 36.3°F (2.4°C). An escalation in the average high-temperature is seen with the onset of April, moving from an icy 39.7°F (4.3°C) in March to a fresh 53.2°F (11.8°C). Weather in April »
Weather in May
May, the last month of the spring in Simpson, is a comfortable month, with temperature in the range of an average low of 46.2°F (7.9°C) and an average high of 64.6°F (18.1°C). May shows a rise in the average high-temperature, moving from April's fresh 53.2°F (11.8°C) to an enjoyable 64.6°F (18.1°C). Weather in May »
Weather in June
The first month of the summer, June, is an agreeable month in Simpson, Montana, with an average temperature fluctuating between 73°F (22.8°C) and 53.1°F (11.7°C). In Simpson, stepping into June brings a gentle temperature nudge, moving slightly up from May's enjoyable 64.6°F (18.1°C) to an agreeable 73°F (22.8°C). Weather in June »
Weather in July
July is a warm summer month in Simpson, Montana, with an average temperature varying between 60.4°F (15.8°C) and 82.8°F (28.2°C). Simpson's warmest weather arrives in July, when temperatures average a high of 82.8°F (28.2°C) and a low of 60.4°F (15.8°C). Throughout July, the heat index is appraised at 82.4°F (28°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Simpson, Montana, with an average temperature ranging between max 81.3°F (27.4°C) and min 61.3°F (16.3°C). The arrival of August coincides with an average high-temperature of a still moderately hot 81.3°F (27.4°C), indicating a minimal shift from July's 82.8°F (28.2°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a pleasant month in Simpson, Montana, with an average temperature fluctuating between 70.5°F (21.4°C) and 52.5°F (11.4°C). September indicates a shift in the average high-temperature, from August's warm 81.3°F (27.4°C) to a pleasant 70.5°F (21.4°C). Weather in September »
Weather in October
October, like September, in Simpson, Montana, is a cool autumn month, with an average temperature varying between 54.3°F (12.4°C) and 38.8°F (3.8°C). In Simpson, stepping into October signifies a significant temperature decrement, moving down from September's agreeable 70.5°F (21.4°C) to a fresh 54.3°F (12.4°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a wintry month in Simpson, Montana, with an average temperature ranging between min 26.2°F (-3.2°C) and max 39.4°F (4.1°C). With the onset of November, Simpson's average high-temperature witnesses a clear drop, receding from October's cool 54.3°F (12.4°C) to a cold 39.4°F (4.1°C). Weather in November »
Weather in December
The first month of the winter, December, is also a subzero cold month in Simpson, Montana, with temperature in the range of an average high of 27.1°F (-2.7°C) and an average low of 15.4°F (-9.2°C). During January and December, Simpson experiences its lowest temperatures, averaging a high-temperature of 27.1°F (-2.7°C). Weather in December »
Updated: Aug 5, 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 time of the year is the coldest?
The months of January and December bring the lowest temperatures, averaging a high of 27.1°F (-2.7°C).
What is the most humid month?
With an average relative humidity of 83%, January is the most humid month.
How much does it rain?
Throughout the year, there are 98.7 rainfall days, and 8.23" (209mm) of precipitation is accumulated.
When does it snow?
January through May, September through December are months with snowfall in Simpson.
How much does it snow?
Throughout the year, there are 53.5 snowfall days, and 14.25" (362mm) of snow is accumulated.
When is the lowest UV index in Simpson?
January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index.
What is the snowiest month?
February is the month with the most snowfall. Snow falls for 11 days and accumulates 2.72" (69mm) of snow.
What is the month with the least sunshine?
February has the least sunshine of the year, with an average of 5.3h 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 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 wettest month?
The month with the most rainfall is June, when the rain falls for 13.4 days and typically aggregates up to 1.5" (38mm) of precipitation.
When it does not snow?
In Simpson, snow does not fall in June through August.
When are the longest days?
June has the longest days of the year, with an average of 16h and 6min of daylight.
What is the hottest time of year?
Simpson's warmest month, July, registers temperatures that range from a high of 82.8°F (28.2°C) to a low of 60.4°F (15.8°C).
What month has the most sunshine?
The month with the most sunshine is July, with an average of 12h of sunshine.
What is the month with the highest UV index?
July is the month with the highest UV index, with an average maximum UV index of 6.
What is the least humid month?
The least humid month is August, with an average relative humidity of 40%.
What is the driest month?
The month with the least rainfall is December, when the rain falls for 4.4 days and typically collects 0.31" (8mm) of precipitation.
What is the month with the shortest days?
With an average of 8h and 18min of daylight, December has the shortest days of the year.
Average temperature
Simpson, MT
The warmest month (with the highest average high temperature) is July (82.8°F).
The months with the lowest average high temperature are January and December (27.1°F).
The month with the highest average low temperature is August (61.3°F).
The coldest month (with the lowest average low temperature) is February (13.5°F).
Average pressure
Simpson, MT
- Average pressure in January:
30.12"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.01"Hg - Average pressure in April:
29.92"Hg - Average pressure in May:
29.92"Hg - Average pressure in June:
29.84"Hg
- Average pressure in July:
29.89"Hg - Average pressure in August:
29.88"Hg - Average pressure in September:
29.93"Hg - Average pressure in October:
29.97"Hg - Average pressure in November:
30.03"Hg - Average pressure in December:
30.11"Hg
The months with the highest atmospheric pressure are January and February (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed
Simpson, MT
- Average wind speed in January:
10.1mph - Average wind speed in February:
9mph - Average wind speed in March:
9.6mph - Average wind speed in April:
10.6mph - Average wind speed in May:
9.7mph - Average wind speed in June:
9.6mph
- Average wind speed in July:
8.8mph - Average wind speed in August:
8.5mph - Average wind speed in September:
9mph - Average wind speed in October:
10.1mph - Average wind speed in November:
10.3mph - Average wind speed in December:
9.8mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (8.5mph).
Average humidity
Simpson, MT
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is August (40%).
Average rainfall
Simpson, MT
- Average rainfall in January:
0.43" - Average rainfall in February:
0.43" - Average rainfall in March:
0.51" - Average rainfall in April:
0.71" - Average rainfall in May:
1.26" - Average rainfall in June:
1.5"
- Average rainfall in July:
0.79" - Average rainfall in August:
0.59" - Average rainfall in September:
0.63" - Average rainfall in October:
0.59" - Average rainfall in November:
0.47" - Average rainfall in December:
0.31"
The wettest month (with the highest rainfall) is June (1.5").
The driest month (with the least rainfall) is December (0.31").
Average rainfall days
Simpson, MT
- Average rainfall days in January:
4.5 days - Average rainfall days in February:
4 days - Average rainfall days in March:
9.2 days - Average rainfall days in April:
11.3 days - Average rainfall days in May:
13.8 days - Average rainfall days in June:
13.4 days
- Average rainfall days in July:
9.2 days - Average rainfall days in August:
8 days - Average rainfall days in September:
7.6 days - Average rainfall days in October:
7.7 days - Average rainfall days in November:
5.6 days - Average rainfall days in December:
4.4 days
The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is February (4 days).
Average snowfall
Simpson, MT
- Average snowfall in January:
2.6" - Average snowfall in February:
2.72" - Average snowfall in March:
1.73" - Average snowfall in April:
1.46" - Average snowfall in May:
0.51" - Average snowfall in June:
0"
The month with the highest snowfall is February (2.72").
The months with the least snowfall are June, July and August (0").
Average snowfall days
Simpson, MT
- Average snowfall days in January:
10.4 days - Average snowfall days in February:
11 days - Average snowfall days in March:
7.8 days - Average snowfall days in April:
4.5 days - Average snowfall days in May:
0.7 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:
0.2 days - Average snowfall days in October:
1.9 days - Average snowfall days in November:
6.5 days - Average snowfall days in December:
10.5 days
The month with the highest number of snowfall days is February (11 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight / Average sunshine
Simpson, MT
- Average daylight in January:
8h and 5min - Average daylight in February:
10h and 1min - Average daylight in March:
11h and 5min - Average daylight in April:
13h and 5min - Average daylight in May:
15h and 2min - Average daylight in June:
16h and 1min
- Average daylight in July:
15h and 4min - Average daylight in August:
14h and 2min - Average daylight in September:
12h and 4min - Average daylight in October:
10h and 5min - Average daylight in November:
9h and 1min - Average daylight in December:
8h and 2min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in January:
5h and 4min - Average sunshine in February:
5h and 2min - Average sunshine in March:
7h and 1min - Average sunshine in April:
9h and 3min - Average sunshine in May:
10h and 2min - Average sunshine in June:
11h and 2min
- Average sunshine in July:
12h and 0min - Average sunshine in August:
11h and 4min - Average sunshine in September:
10h and 1min - Average sunshine in October:
6h and 4min - Average sunshine in November:
6h and 1min - Average sunshine in December:
5h and 2min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is February (Average sunshine: 5h and 18min).
Average sunshine days
Simpson, MT
- Average sunshine days in January:
17.8 days - Average sunshine days in February:
16 days - Average sunshine days in March:
15.6 days - Average sunshine days in April:
12.8 days - Average sunshine days in May:
14.9 days - Average sunshine days in June:
14.1 days
- Average sunshine days in July:
19.6 days - Average sunshine days in August:
18.7 days - Average sunshine days in September:
20.3 days - Average sunshine days in October:
19.7 days - Average sunshine days in November:
19.5 days - Average sunshine days in December:
18.7 days
The month with the most sunshine days is September (20.3 days).
The month with the least sunshine days is April (12.8 days).
Average UV index
Simpson, MT
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover
Simpson, MT
The month with the most cloud cover is February (Cloud cover 46).
The months with the least cloud cover are July and August (Cloud cover 16).
Average visibility
Simpson, MT
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).
Simpson, Montana, USA
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