Climate and monthly weather forecast
Heron, MT

Weather in January

January, like December, is another subzero cold winter month in Heron, Montana, with an average temperature varying between 30.7°F (-0.7°C) and 19.6°F (-6.9°C). In January, the average high-temperature is almost the same as in December - a still subzero cold 30.7°F (-0.7°C). Weather in January »

Weather in February

The last month of the winter, February, is a wintry month in Heron, Montana, with temperature in the range of an average high of 32°F (0°C) and an average low of 19.8°F (-6.8°C). In Heron, the average high-temperature in February is relatively the same as in January - a cold 32°F (0°C). Weather in February »

Weather in March

The first month of the spring, March, is also a wintry month in Heron, Montana, with an average temperature varying between 24.8°F (-4°C) and 39.2°F (4°C). In March, the average high-temperature slightly increases from a wintry 32°F (0°C) in February to a still cold 39.2°F (4°C). Weather in March »

Weather in April

April is a chilly spring month in Heron, Montana, with temperature in the range of an average high of 48.7°F (9.3°C) and an average low of 30.6°F (-0.8°C). In Heron, the average high-temperature in April rises from a wintry 39.2°F (4°C) in March to a chilly 48.7°F (9.3°C). Weather in April »

Weather in May

May, the last month of the spring in Heron, is an enjoyable month, with an average temperature ranging between max 61.3°F (16.3°C) and min 37.9°F (3.3°C). In May, the average high-temperature increases from a chilly 48.7°F (9.3°C) in April to a comfortable 61.3°F (16.3°C). Weather in May »

Weather in June

The first month of the summer, June, is also an enjoyable month in Heron, Montana, with an average temperature fluctuating between 43°F (6.1°C) and 66.7°F (19.3°C). In Heron, the average high-temperature in June marginally rises from a comfortable 61.3°F (16.3°C) in May to a still enjoyable 66.7°F (19.3°C). Weather in June »

Weather in July

July in Heron, Montana, is a moderately hot summer month, with an average temperature varying between 48.7°F (9.3°C) and 77.7°F (25.4°C). In Heron, the average high-temperature in July increases from an enjoyable 66.7°F (19.3°C) in June to a moderately hot 77.7°F (25.4°C). Weather in July »

Weather in August

August, the last month of the summer in Heron, is also a moderately hot month, with an average temperature ranging between min 49.1°F (9.5°C) and max 78.3°F (25.7°C). The warmest month is August, with an average high-temperature of 78.3°F (25.7°C) and an average low-temperature of 49.1°F (9.5°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a comfortable month in Heron, Montana, with an average temperature varying between 67.8°F (19.9°C) and 41.7°F (5.4°C). In Heron, the average high-temperature in September drops from a warm 78.3°F (25.7°C) in August to a comfortable 67.8°F (19.9°C). Weather in September »

Weather in October

October, the same as September, is another fresh autumn month in Heron, Montana, with an average temperature varying between 51.1°F (10.6°C) and 33.3°F (0.7°C). In Heron, the average high-temperature in October plummets from an enjoyable 67.8°F (19.9°C) in September to a cool 51.1°F (10.6°C). Weather in October »

Weather in November

The last month of the autumn, November, is another cold month in Heron, Montana, with an average temperature varying between 37.8°F (3.2°C) and 26.4°F (-3.1°C). In November, the average high-temperature drops from a fresh 51.1°F (10.6°C) in October to a wintry 37.8°F (3.2°C). Weather in November »

Weather in December

December, the first month of the winter in Heron, is also a subzero cold month, with an average temperature ranging between max 29.3°F (-1.5°C) and min 18.7°F (-7.4°C). With an average high-temperature of 29.3°F (-1.5°C) and an average low-temperature of 18.7°F (-7.4°C), December is the coldest month. Weather in December »
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FAQ

What is the most humid month in Heron?

With an average relative humidity of 94%, January is the most humid month in Heron.

How many days does it rain in Heron?

In Heron, during the entire year, the rain falls for 161.9 days and collects up to 27.48" (698mm) of precipitation.

When does it snow in Heron?

Months with snowfall in Heron are January through May, September through December.

What is the snowiest month in Heron?

January is the month with the most snowfall in Heron, Montana. Snow falls for 15.9 days and accumulates 15.87" (403mm) of snow.

How many days does it snow in Heron?

Throughout the year, in Heron, Montana, there are 80.8 snowfall days, and 60" (1524mm) of snow is accumulated.

What is the month with the least sunshine in Heron?

January has the least sunshine of the year, with an average of 3.2h of sunshine.

What is the month with the lowest UV index in Heron?

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 1.

When is Daylight Saving Time (DST) in Heron?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts in Heron, Montana, and the time zone changes from MST to MDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from MDT to MST.

When it does not snow in Heron?

In Heron, snow does not fall in June through August.

When are the longest days in Heron?

With an average of 15h and 59min of daylight, June has the longest days of the year.

When is the highest UV index in Heron?

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

What is the warmest month in Heron?

The warmest month is August, with an average high-temperature of 78.3°F (25.7°C) and an average low-temperature of 49.1°F (9.5°C).

What is the least humid month in Heron?

The least humid month in Heron is August, with an average relative humidity of 52%.

What is the driest month in Heron?

August is the month with the least rainfall. Rain falls for 6.9 days and accumulates 0.55" (14mm) of precipitation.

What month has the most sunshine in Heron?

With an average of 11.8h of sunshine, August has the most sunshine of the year in Heron.

What is the coldest month in Heron?

The coldest month in Heron is December, with an average high-temperature of 29.3°F (-1.5°C) and an average low-temperature of 18.7°F (-7.4°C).

What is the rainiest month in Heron?

December is the month with the most rainfall. Rain falls for 11.2 days and accumulates 3.66" (93mm) of precipitation.

What is the month with the shortest days in Heron?

The month with the shortest days is December, with an average of 8h and 26min of daylight.

Average temperature
Heron, MT

Average temperature - Heron, MT

The warmest month (with the highest average high temperature) is August (78.3°F).
The month with the lowest average high temperature is December (29.3°F).

The month with the highest average low temperature is August (49.1°F).
The coldest month (with the lowest average low temperature) is December (18.7°F).

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Average pressure
Heron, MT

Average pressure - Heron, MT

The month with the highest atmospheric pressure is January (30.19").
The months with the lowest atmospheric pressure are June and August (29.92").

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Average wind speed
Heron, MT

Average wind speed - Heron, MT

The windiest month (with the highest average wind speed) is April (4.5mph).
The calmest month (with the lowest average wind speed) is December (3.5mph).

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Average rainfall
Heron, MT

Average rainfall - Heron, MT

The wettest month (with the highest rainfall) is December (3.66").
The driest month (with the least rainfall) is August (0.55").

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Average rainfall days
Heron, MT

Average rainfall days - Heron, MT

The month with the highest number of rainy days is April (19.3 days).
The month with the least rainy days is August (6.9 days).

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Average snowfall
Heron, MT

Average snowfall - Heron, MT

The month with the highest snowfall is January (15.87").
The months with the least snowfall are June, July and August (0").

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Average snowfall days
Heron, MT

Average snowfall days - Heron, MT

The month with the highest number of snowfall days is December (19.5 days).
The months with the least snowfall days are June, July and August (0 days).

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Average daylight / Average sunshine
Heron, MT

Average daylight / Average sunshine - Heron, MT

The month with the longest days is June (Average daylight: 15h and 59min).
The month with the shortest days is December (Average daylight: 8h and 26min).

The month with the most sunshine is August (Average sunshine: 11.8h).
The month with the least sunshine is January (Average sunshine: 3.2h).

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Average sunshine days
Heron, MT

Average sunshine days - Heron, MT

The month with the most sunshine days is July (20.9 days).
The month with the least sunshine days is March (7.1 days).

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Average visibility
Heron, MT

Average visibility - Heron, MT

The months with the highest visibility are May, June, July, August and September (6mi).
The months with the lowest visibility are January, February and December (3mi).

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