Climate and monthly weather forecast
Forsyth, MT

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Weather in January

January, like December, is a freezing cold winter month in Forsyth, Montana, with temperature in the range of an average low of 16.3°F (-8.7°C) and an average high of 29.7°F (-1.3°C). January, noted for its average high-temperature of 29.7°F (-1.3°C) and an average low-temperature of 16.3°F (-8.7°C), is considered the coldest month. Weather in January »

Weather in February

The last month of the winter, February, is also a subzero cold month in Forsyth, Montana, with an average temperature ranging between max 30.7°F (-0.7°C) and min 17.1°F (-8.3°C). As January transitions into February, the average high-temperature rests at a still freezing cold 30.7°F (-0.7°C), maintaining a close resemblance to the previous month. Weather in February »

Weather in March

March, the first month of the spring in Forsyth, is a chilly month, with an average temperature varying between 44.8°F (7.1°C) and 29.5°F (-1.4°C). Forsyth's transition into March sees a rise in the average high-temperature, advancing from a subzero cold 30.7°F (-0.7°C) in February to a frosty 44.8°F (7.1°C). Weather in March »

Weather in April

April is a fresh spring month in Forsyth, Montana, with an average temperature fluctuating between 55°F (12.8°C) and 37.9°F (3.3°C). With the beginning of April, Forsyth's average high-temperature sees an increase, transitioning from a chilly 44.8°F (7.1°C) in March to a fresh 55°F (12.8°C). Weather in April »

Weather in May

The last month of the spring, May, is a comfortable month in Forsyth, Montana, with an average temperature fluctuating between 65.7°F (18.7°C) and 47.1°F (8.4°C). May's arrival sees a rise in the average high-temperature, jumping from April's fresh 55°F (12.8°C) to an enjoyable 65.7°F (18.7°C). Weather in May »

Weather in June

The first month of the summer, June, is a moderately hot month in Forsyth, Montana, with an average temperature varying between 56.8°F (13.8°C) and 77.2°F (25.1°C). The arrival of June brings an increase in high-temperatures, moving from a refreshing 65.7°F (18.7°C) in May to a moderately hot 77.2°F (25.1°C). Weather in June »

Weather in July

July is a hot summer month in Forsyth, Montana, with an average temperature varying between 64.9°F (18.3°C) and 86.5°F (30.3°C). The warmest period tends to be July, when average temperatures fluctuate between a high of 86.5°F (30.3°C) and a low of 64.9°F (18.3°C). July's heat index is calculated to be a tropical 86°F (30°C). Weather in July »

Weather in August

August, the last month of the summer in Forsyth, is another warm month, with an average temperature fluctuating between 64.4°F (18°C) and 84.4°F (29.1°C). August commences with an average high-temperature of a moderately hot 84.4°F (29.1°C), showing little deviation from July's 86.5°F (30.3°C). Weather in August »

Weather in September

September, the first month of the autumn in Forsyth, is still a warm month, with temperature in the range of an average high of 74.1°F (23.4°C) and an average low of 55.4°F (13°C). Forsyth's transition into September involves a shift in temperature, receding from a warm 84.4°F (29.1°C) in August to a still moderately hot 74.1°F (23.4°C). Weather in September »

Weather in October

October, like September, is a moderate autumn month in Forsyth, Montana, with an average temperature ranging between max 56.3°F (13.5°C) and min 41.5°F (5.3°C). The shift into October is marked by a considerable temperature decrease, with the average high-temperature dropping from a warm 74.1°F (23.4°C) in September to a refreshing 56.3°F (13.5°C). Weather in October »

Weather in November

November, the last month of the autumn in Forsyth, is another chilly month, with an average temperature fluctuating between 28.9°F (-1.7°C) and 43°F (6.1°C). The transition into November is accompanied by a temperature decrease, with the average high-temperature shifting from a moderate 56.3°F (13.5°C) in October to a frosty 43°F (6.1°C). Weather in November »

Weather in December

December, the first month of the winter in Forsyth, is also a subzero cold month, with an average temperature fluctuating between 30.2°F (-1°C) and 17.6°F (-8°C). Forsyth's December weather shows a moderate shift in high-temperatures, falling from November's frosty 43°F (6.1°C) to a subzero cold 30.2°F (-1°C). Weather in December »
Updated: Jul 20, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What time of the year is the coldest?

Temperature records mark January as the coldest month, with highs averaging 29.7°F (-1.3°C) and lows at 16.3°F (-8.7°C).

What is the most humid month?

January is the most humid month, with an average relative humidity of 81%.

How much does it rain?

Throughout the year, there are 121.7 rainfall days, and 13.23" (336mm) of precipitation is accumulated.

When does it snow?

January through May, October through December are months with snowfall.

How much does it snow?

In Forsyth, during the entire year, snow falls for 56.6 days and aggregates up to 21.06" (535mm) of snow.

When does it snow the most?

February is the month with the most snowfall. Snow falls for 11.9 days and accumulates 4.53" (115mm) of snow.

What is the month with the least sunshine?

February has the least sunshine of the year, with an average of 5.2h 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 in Forsyth is May, when the rain falls for 15.1 days and typically aggregates up to 2.05" (52mm) of precipitation.

When it does not snow?

June through September are months without snowfall.

When are the longest days?

With an average of 15h and 42min of daylight, June has the longest days of the year.

What month is the hottest?

In Forsyth, July is identified by the average highest temperatures, reaching a peak of 86.5°F (30.3°C) and a low of 64.9°F (18.3°C).

What month has the most sunshine?

With an average of 11.8h of sunshine, July has the most sunshine of the year.

When is the highest UV index?

The month with the highest UV index is July, with an average maximum UV index of 7.

What is the least humid month?

With an average relative humidity of 38%, August is the least humid month.

What is the driest month?

The month with the least rainfall is November, when the rain falls for 7.1 days and typically collects 0.63" (16mm) of precipitation.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 8h and 42min of daylight.

When is the lowest UV index in Forsyth?

December is the month with the lowest UV index, with an average maximum UV index of 1.

Average temperature
Forsyth, MT

Average temperature - Forsyth, MT

The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (29.7°F).

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (16.3°F).

Average pressure
Forsyth, MT

Average pressure - Forsyth, MT

The months with the highest atmospheric pressure are January and February (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

Average wind speed
Forsyth, MT

Average wind speed - Forsyth, MT

The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest month (with the lowest average wind speed) is August (8.9mph).

Average humidity
Forsyth, MT

Average humidity - Forsyth, MT

The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is August (38%).

Average rainfall
Forsyth, MT

Average rainfall - Forsyth, MT

The wettest month (with the highest rainfall) is May (2.05").
The driest month (with the least rainfall) is November (0.63").

Average rainfall days
Forsyth, MT

Average rainfall days - Forsyth, MT

The month with the highest number of rainy days is May (15.1 days).
The months with the least rainy days are January, February and December (6.5 days).

Average snowfall
Forsyth, MT

Average snowfall - Forsyth, MT

The month with the highest snowfall is February (4.53").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days
Forsyth, MT

Average snowfall days - Forsyth, MT

The month with the highest number of snowfall days is January (12.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight / Average sunshine
Forsyth, MT

Average daylight / Average sunshine - Forsyth, MT

The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 12min).

Average sunshine days
Forsyth, MT

Average sunshine days - Forsyth, MT

The month with the most sunshine days is September (17.9 days).
The month with the least sunshine days is April (11.9 days).

Average visibility
Forsyth, MT

Average visibility - Forsyth, 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).

Forsyth, Montana, USA

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