Monthly weather forecast and climate
Simpson, MT

January, like December, is another subzero cold winter month in Simpson, Montana, with average temperature ranging between min 14.4°F (-9.8°C) and max 27.1°F (-2.7°C). January and December, with an average high-temperature of 27.1°F (-2.7°C), are the coldest months. Weather in January »

February, the last month of the winter, in Simpson, is also a subzero cold month, with average temperature fluctuating between 27.7°F (-2.4°C) and 13.5°F (-10.3°C). In Simpson, the average high-temperature in February is almost the same as in January - a still freezing cold 27.7°F (-2.4°C). Weather in February »

The first month of the spring, March, is a wintry month in Simpson, Montana, with average temperature ranging between min 24.6°F (-4.1°C) and max 39.7°F (4.3°C). In March, the average high-temperature rises, from a subzero cold 27.7°F (-2.4°C) in February, to a wintry 39.7°F (4.3°C). Weather in March »

April in Simpson, Montana, is a fresh spring month, with average temperature fluctuating between 53.2°F (11.8°C) and 36.3°F (2.4°C). In April, the average high-temperature rises, from a wintry 39.7°F (4.3°C) in March, to a fresh 53.2°F (11.8°C). Weather in April »

May, the last month of the spring, in Simpson, is an enjoyable month, with average temperature ranging between max 64.6°F (18.1°C) and min 46.2°F (7.9°C). In May, the average high-temperature increases, from a cool 53.2°F (11.8°C) in April, to an enjoyable 64.6°F (18.1°C). Weather in May »

The first month of the summer, June, is an agreeable month in Simpson, Montana, with average temperature ranging between max 73°F (22.8°C) and min 53.1°F (11.7°C). In Simpson, Montana, the average high-temperature slightly increases, from an enjoyable 64.6°F (18.1°C) in May, to a pleasant 73°F (22.8°C). Weather in June »

July in Simpson, Montana, is a warm summer month, with temperature in the range of an average high of 82.8°F (28.2°C) and an average low of 60.4°F (15.8°C). The warmest month is July, with an average high-temperature of 82.8°F (28.2°C) and an average low-temperature of 60.4°F (15.8°C). The average heat index is evaluated at 82.6°F (28.1°C). Weather in July »

August, the last month of the summer, in Simpson, is another warm month, with average temperature ranging between min 61.3°F (16.3°C) and max 81.3°F (27.4°C). In August, the average high-temperature is practically the same as in July - a still moderately hot 81.3°F (27.4°C). Weather in August »

The first month of the autumn, September, is still a pleasant month in Simpson, Montana, with average temperature ranging between min 52.5°F (11.4°C) and max 70.5°F (21.4°C). In September, the average high-temperature drops, from a warm 81.3°F (27.4°C) in August, to an agreeable 70.5°F (21.4°C). Weather in September »

October, like September, in Simpson, Montana, is a cool autumn month, with temperature in the range of an average high of 54.3°F (12.4°C) and an average low of 38.8°F (3.8°C). In October, the average high-temperature plummets, from an agreeable 70.5°F (21.4°C) in September, to a fresh 54.3°F (12.4°C). Weather in October »

The last month of the autumn, November, is another cold month in Simpson, Montana, with average temperature varying between 26.2°F (-3.2°C) and 39.4°F (4.1°C). In Simpson, the average high-temperature significantly decreases, from a fresh 54.3°F (12.4°C) in October, to a cold 39.4°F (4.1°C). Weather in November »

The first month of the winter, December, is also a subzero cold month in Simpson, Montana, with average temperature ranging between min 15.4°F (-9.2°C) and max 27.1°F (-2.7°C). The coldest months are January and December, with an average high-temperature of 27.1°F (-2.7°C). Weather in December »

What are the coldest months in Simpson?

The coldest months in Simpson, Montana, are January and December, with an average high-temperature of 27.1°F (-2.7°C).

What is the most humid month in Simpson?

The most humid month in Simpson is January, with an average relative humidity of 83%.

How much does it rain in Simpson?

In Simpson, during the entire year, the rain falls for 98.7 days and collects up to 8.23" (209mm) of precipitation.

When does it snow in Simpson?

January through May, September through December are months with snowfall in Simpson, Montana.

How much does it snow in Simpson?

In Simpson, during the entire year, snow falls for 53.5 days, and aggregates up to 14.25" (362mm) of snow.

What are the months with the lowest UV index in Simpson?

Months with the lowest UV index in Simpson, Montana, are January through March, October through December, with an average maximum UV index of 2.

When does it snow the most in Simpson?

The month with the most snowfall in Simpson is February when snow falls for 11 days and typically aggregates up to 2.72" (69mm) of snow.

What is the month with the least sunshine in Simpson?

With an average of 5.3h of sunshine, February has the least sunshine of the year in Simpson, Montana.

What is the rainiest month in Simpson?

June is the month with the most rainfall in Simpson. Rain falls for 13.4 days and accumulates 1.5" (38mm) of precipitation.

When it does not snow in Simpson?

June through August are months without snowfall in Simpson.

When are the longest days in Simpson?

With an average of 16.1h of daylight, June has the longest days of the year in Simpson.

What is the warmest month in Simpson?

With an average high-temperature of 82.8°F (28.2°C) and an average low-temperature of 60.4°F (15.8°C), July is the warmest month in Simpson.

What month has the most sunshine in Simpson?

The month with the most sunshine is July, with an average of 12h of sunshine.

When is the highest UV index in Simpson?

The month with the highest UV index in Simpson, Montana, is July, with an average maximum UV index of 6.

What is the least humid month in Simpson?

August is the least humid month, with an average relative humidity of 40%.

What is the driest month in Simpson?

December is the month with the least rainfall in Simpson. Rain falls for 4.4 days and accumulates 0.31" (8mm) of precipitation.

What is the month with the shortest days in Simpson?

December has the shortest days of the year in Simpson, with an average of 8.3h of daylight.
Average temperature - Simpson, MT
Average pressure - Simpson, MT

Months with the highest atmospheric pressure are January and February (30.12").
The month with the lowest atmospheric pressure is June (29.84").

Average wind speed - Simpson, MT

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 rainfall - Simpson, MT
Average rainfall days - Simpson, MT
Average snowfall - Simpson, MT
Average snowfall days - Simpson, MT

The month with the highest number of snowfall days is February (11 days).
Months with the least snowfall days are June, July and August (0 days).

Average daylight / Average sunshine - Simpson, MT

The month with the longest days is June (Average daylight: 16.1h).
The month with the shortest days is December (Average daylight: 8.3h).

The month with the most sunshine is July (Average sunshine: 12h).
The month with the least sunshine is February (Average sunshine: 5.3h).

Average sunshine days - Simpson, MT

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
Average visibility - Simpson, MT

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).