Climate and monthly weather forecastSaint Johns, MT
Climate and monthly weather forecast
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 »Updated: Jul 6, 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
Saint Johns witnesses its lowest temperatures in January and December, reaching an average of 27.1°F (-2.7°C).
With an average relative humidity of 83%, January is the most humid month.
In Saint Johns, during the entire year, the rain falls for 98.7 days and collects up to 8.23" (209mm) of precipitation.
Months with snowfall are January through May, September through December.
Throughout the year, there are 53.5 snowfall days, and 14.25" (362mm) of snow is accumulated.
The months with the lowest UV index are January through March, October through December, with an average maximum UV index of 2.
The month with the most snowfall is February, when snow falls for 11 days and typically aggregates up to 2.72" (69mm) of snow.
The month with the least sunshine is February, with an average of 5.3h of sunshine.
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.
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.
June through August are months without snowfall.
The month with the longest days is June, with an average of 16h and 6min of daylight.
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).
The month with the most sunshine in Saint Johns is July, with an average of 12h of sunshine.
With an average maximum UV index of 6, July is the month with the highest UV index.
With an average relative humidity of 40%, August is the least humid month in Saint Johns.
December is the month with the least rainfall. Rain falls for 4.4 days and accumulates 0.31" (8mm) of precipitation.
The month with the shortest days is December, with an average of 8h and 18min of daylight.
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 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
Saint Johns, 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
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 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
Saint Johns, 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
Saint Johns, 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
Saint Johns, 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
Saint Johns, MT
- Average daylight in January:
8h and 48min - Average daylight in February:
10h and 12min - Average daylight in March:
11h and 54min - Average daylight in April:
13h and 42min - Average daylight in May:
15h and 18min - Average daylight in June:
16h and 6min
- Average daylight in July:
15h and 42min - Average daylight in August:
14h and 18min - Average daylight in September:
12h and 36min - Average daylight in October:
10h and 48min - Average daylight in November:
9h and 12min - Average daylight in December:
8h and 18min
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 36min - Average sunshine in February:
5h and 18min - Average sunshine in March:
7h and 12min - Average sunshine in April:
9h and 30min - Average sunshine in May:
10h and 18min - Average sunshine in June:
11h and 24min
- Average sunshine in July:
12h and 0min - Average sunshine in August:
11h and 36min - Average sunshine in September:
10h and 6min - Average sunshine in October:
6h and 36min - Average sunshine in November:
6h and 12min - Average sunshine in December:
5h and 24min
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 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
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 cloud cover
Saint Johns, 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
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).
