Climate and monthly weather forecast
Saint Johns, MT

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Weather in January

January, the same as December, in Saint Johns, Montana, is a freezing cold winter month, with an average temperature varying between 14.4°F (-9.8°C) and 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 January »

Weather in February

The last month of the winter, February, is also a subzero cold month in Saint Johns, Montana, 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 arrival of February is marked by an average high-temperature of a still freezing cold 27.7°F (-2.4°C), bearing a close resemblance to January. Weather in February »

Weather in March

March, the first month of the spring in Saint Johns, is an icy month, with temperature in the range of an average high of 39.7°F (4.3°C) and an average low of 24.6°F (-4.1°C). The shift from February to March is marked by an increase in the average high-temperature, moving from a subzero cold 27.7°F (-2.4°C) to a wintry 39.7°F (4.3°C). Weather in March »

Weather in April

April is a fresh spring month in Saint Johns, Montana, with an average temperature varying between 53.2°F (11.8°C) and 36.3°F (2.4°C). April brings a temperature increase, with average high-temperatures moving from March's wintry 39.7°F (4.3°C) to a fresh 53.2°F (11.8°C). Weather in April »

Weather in May

The last month of the spring, May, is a refreshing month in Saint Johns, Montana, with an average temperature fluctuating between 46.2°F (7.9°C) and 64.6°F (18.1°C). Saint Johns's transition into May is marked by a rise in the average high-temperature, advancing from a cool 53.2°F (11.8°C) in April to a comfortable 64.6°F (18.1°C). Weather in May »

Weather in June

The first month of the summer, June, is an agreeable month in Saint Johns, Montana, with an average temperature ranging between max 73°F (22.8°C) and min 53.1°F (11.7°C). With the onset of June, Saint Johns experiences a subtle temperature shift, with the average high-temperature moving from a refreshing 64.6°F (18.1°C) in May to an agreeable 73°F (22.8°C). Weather in June »

Weather in July

July in Saint Johns, Montana, is a moderately hot summer month, with an average temperature fluctuating between 82.8°F (28.2°C) and 60.4°F (15.8°C). In Saint Johns, July records the highest average temperatures, peaking at 82.8°F (28.2°C) and reaching a low of 60.4°F (15.8°C). July's average heat index is calculated to be 82.4°F (28°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Saint Johns, Montana, with an average temperature varying between 81.3°F (27.4°C) and 61.3°F (16.3°C). Saint Johns, Montana, notes an average high-temperature of a still moderately hot 81.3°F (27.4°C) in August, displaying minor variation from July. Weather in August »

Weather in September

The first month of the autumn, September, is still a pleasant month in Saint Johns, Montana, with an average temperature varying between 52.5°F (11.4°C) and 70.5°F (21.4°C). The onset of September results in a decrease in the average high-temperature, receding from a warm 81.3°F (27.4°C) in August to a pleasant 70.5°F (21.4°C). Weather in September »

Weather in October

October, the same as September, is another fresh autumn month in Saint Johns, Montana, with an average temperature fluctuating between 54.3°F (12.4°C) and 38.8°F (3.8°C). October's arrival brings a noticeable temperature shift, dropping from a pleasant 70.5°F (21.4°C) in September 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 Saint Johns, Montana, with an average temperature fluctuating between 26.2°F (-3.2°C) and 39.4°F (4.1°C). The arrival of November signals a clear decrease in the average high-temperature, falling from a cool 54.3°F (12.4°C) in October to a cold 39.4°F (4.1°C). Weather in November »

Weather in December

December, the first month of the winter in Saint Johns, is still a freezing cold month, with an average temperature ranging between max 27.1°F (-2.7°C) and min 15.4°F (-9.2°C). January and December, when the average high-temperature reaches 27.1°F (-2.7°C), are the coldest months. Weather in December »

Frequently asked questions

What part of the year is the coldest?

Saint Johns witnesses its lowest temperatures in January and December, reaching an average 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 many days does it rain?

In Saint Johns, 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 Saint Johns?

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

How much does it snow?

Throughout the year, there are 53.5 snowfall days, and 14.25" (362mm) of snow is accumulated.

What is the month with the lowest UV index in Saint Johns?

The months with the lowest UV index are January through March, October through December, with an average maximum UV index of 2.

When does it snow the most?

The month with the most snowfall 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?

The month with the least sunshine is February, 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 in Saint Johns?

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?

June through August are months without snowfall.

When are the longest days?

The month with the longest days is June, with an average of 16h and 6min of daylight.

What month is the hottest?

Saint Johns'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 in Saint Johns is July, with an average of 12h of sunshine.

What is the month with the highest UV index?

With an average maximum UV index of 6, July is the month with the highest UV index.

What is the least humid month?

With an average relative humidity of 40%, August is the least humid month in Saint Johns.

What is the driest month?

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

What is the month with the shortest days?

The month with the shortest days is December, with an average of 8h and 18min of daylight.

Average temperature
Saint Johns, MT

Average temperature - Saint Johns, 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
Saint Johns, MT

Average pressure - Saint Johns, MT

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
Saint Johns, MT

Average wind speed - Saint Johns, 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 humidity
Saint Johns, MT

Average humidity - Saint Johns, MT

The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is August (40%).

Average rainfall
Saint Johns, MT

Average rainfall - Saint Johns, MT

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
Saint Johns, MT

Average rainfall days - Saint Johns, MT

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
Saint Johns, MT

Average snowfall - Saint Johns, MT

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
Saint Johns, MT

Average snowfall days - Saint Johns, MT

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
Saint Johns, MT

Average daylight / Average sunshine - Saint Johns, MT

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).

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
Saint Johns, MT

Average sunshine days - Saint Johns, 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
Saint Johns, MT

Average UV index - Saint Johns, 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 visibility
Saint Johns, MT

Average visibility - Saint Johns, 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).

Saint Johns, Montana, USA

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