Climate and monthly weather forecastChester, MT
Climate and monthly weather forecast
Weather in January
January, the same as December, in Chester, Montana, is a freezing cold winter month, with an average temperature ranging between min 16.7°F (-8.5°C) and max 28.8°F (-1.8°C). Chester notes an average high-temperature of a still subzero cold 28.8°F (-1.8°C) in January, hardly diverging from December. Weather in January »Weather in February
February, the last month of the winter in Chester, is another freezing cold month, with an average temperature ranging between min 16.3°F (-8.7°C) and max 29.3°F (-1.5°C). As Chester, Montana, steps into February, the average high-temperature is measured at a still subzero cold 29.3°F (-1.5°C), displaying minor differences from January's 28.8°F (-1.8°C). Weather in February »Weather in March
The first month of the spring, March, is a cold month in Chester, Montana, with temperature in the range of an average low of 26.6°F (-3°C) and an average high of 41.7°F (5.4°C). Chester's March weather brings a rise in high-temperatures, moving from a subzero cold 29.3°F (-1.5°C) in February to an icy 41.7°F (5.4°C). Weather in March »Weather in April
April is a cool spring month in Chester, Montana, with an average temperature varying between 53.1°F (11.7°C) and 36.5°F (2.5°C). With the arrival of April, the average high-temperature transitions from an icy 41.7°F (5.4°C) in March to a cool 53.1°F (11.7°C). Weather in April »Weather in May
The last month of the spring, May, is a comfortable month in Chester, Montana, with temperature in the range of an average low of 45.1°F (7.3°C) and an average high of 63.1°F (17.3°C). As Chester transitions into May, a rise in the average high-temperature is observed, moving from a cool 53.1°F (11.7°C) in April to a comfortable 63.1°F (17.3°C). Weather in May »Weather in June
June, the first month of the summer in Chester, is an agreeable month, with an average temperature ranging between min 52.2°F (11.2°C) and max 72°F (22.2°C). A soft shift in the average high-temperature is noticeable in June, transitioning from an enjoyable 63.1°F (17.3°C) in May to an agreeable 72°F (22.2°C). Weather in June »Weather in July
July in Chester, Montana, is a moderately hot summer month, with an average temperature fluctuating between 82°F (27.8°C) and 59.5°F (15.3°C). July, known for its average high temperature of 82°F (27.8°C) and an average low temperature of 59.5°F (15.3°C), is the warmest month. For July, the heat index is evaluated at 82.4°F (28°C). Weather in July »Weather in August
August, the last month of the summer in Chester, is another warm month, with temperature in the range of an average high of 81.1°F (27.3°C) and an average low of 60.4°F (15.8°C). Chester's August reports an average high-temperature of a still moderately hot 81.1°F (27.3°C), exhibiting a minor difference from July. Weather in August »Weather in September
September, the first month of the autumn in Chester, is also an agreeable month, with an average temperature ranging between min 52°F (11.1°C) and max 70.2°F (21.2°C). The transition into September involves a decrease in the average high-temperature, falling from a warm 81.1°F (27.3°C) in August to a pleasant 70.2°F (21.2°C). Weather in September »Weather in October
October, like September, in Chester, Montana, is another fresh autumn month, with temperature in the range of an average high of 54°F (12.2°C) and an average low of 38.3°F (3.5°C). With the onset of October, Chester's average high-temperature witnesses a clear drop, receding from September's agreeable 70.2°F (21.2°C) to a cool 54°F (12.2°C). Weather in October »Weather in November
The last month of the autumn, November, is another cold month in Chester, Montana, with an average temperature fluctuating between 26.6°F (-3°C) and 39.9°F (4.4°C). Stepping into November, Chester observes a temperature decline, with the average high falling from October's fresh 54°F (12.2°C) to an icy 39.9°F (4.4°C). Weather in November »Weather in December
December, the first month of the winter in Chester, is also a subzero cold month, with an average temperature ranging between max 28.2°F (-2.1°C) and min 16.7°F (-8.5°C). The coldest period is December, when temperatures fluctuate between an average high of 28.2°F (-2.1°C) and a low of 16.7°F (-8.5°C). Weather in December »Updated: Feb 13, 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
With an average relative humidity of 81%, January is the most humid month.
Throughout the year, in Chester, Montana, there are 113.8 rainfall days, and 11.89" (302mm) of precipitation is accumulated.
Months with snowfall in Chester, Montana, are January through May, September through December.
Throughout the year, there are 65.1 snowfall days, and 24.69" (627mm) of snow is accumulated.
January and December, with an average of 5.3h of sunshine, are months with the least sunshine in Chester, Montana.
The months with the lowest UV index in Chester 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 12.1 days and typically aggregates up to 5" (127mm) of snow.
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.
June is the month with the most rainfall. Rain falls for 13.8 days and accumulates 2.32" (59mm) of precipitation.
In Chester, snow does not fall in June through August.
With an average of 16h and 6min of daylight, June has the longest days of the year.
July is the warmest month in Chester, Montana, exhibiting average temperatures of 82°F (27.8°C) at the peak and 59.5°F (15.3°C) at the base.
The month with the most sunshine is July, with an average of 12h of sunshine.
The month with the highest UV index in Chester, Montana, is July, with an average maximum UV index of 6.
August is the least humid month, with an average relative humidity of 39%.
The coldest temperatures in Chester, Montana, occur during December, when averages reach a peak of 28.2°F (-2.1°C) and a low of 16.7°F (-8.5°C).
December is the month with the least rainfall. Rain falls for 6.9 days and accumulates 0.59" (15mm) of precipitation.
December has the shortest days of the year in Chester, Montana, with an average of 8h and 24min of daylight.
Average temperature
Chester, MT
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is December (28.2°F).
The month with the highest average low temperature is August (60.4°F).
The coldest month (with the lowest average low temperature) is February (16.3°F).
Average pressure
Chester, MT
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.93"Hg - Average pressure in June:
29.85"Hg
- Average pressure in July:
29.9"Hg - Average pressure in August:
29.9"Hg - Average pressure in September:
29.94"Hg - Average pressure in October:
29.99"Hg - Average pressure in November:
30.04"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed
Chester, MT
- Average wind speed in January:
10.3mph - Average wind speed in February:
9.2mph - Average wind speed in March:
9.9mph - Average wind speed in April:
10.8mph - Average wind speed in May:
9.9mph - Average wind speed in June:
9.7mph
- Average wind speed in July:
8.8mph - Average wind speed in August:
8.5mph - Average wind speed in September:
9.3mph - Average wind speed in October:
10.3mph - Average wind speed in November:
10.6mph - Average wind speed in December:
10.2mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest month (with the lowest average wind speed) is August (8.5mph).
Average humidity
Chester, MT
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is August (39%).
Average rainfall
Chester, MT
- Average rainfall in January:
0.63" - Average rainfall in February:
0.71" - Average rainfall in March:
0.71" - Average rainfall in April:
1.26" - Average rainfall in May:
1.73" - Average rainfall in June:
2.32"
- Average rainfall in July:
0.75" - Average rainfall in August:
0.79" - Average rainfall in September:
0.98" - Average rainfall in October:
0.71" - Average rainfall in November:
0.71" - Average rainfall in December:
0.59"
The wettest month (with the highest rainfall) is June (2.32").
The driest month (with the least rainfall) is December (0.59").
Average rainfall days
Chester, MT
- Average rainfall days in January:
5 days - Average rainfall days in February:
5.3 days - Average rainfall days in March:
10.7 days - Average rainfall days in April:
13.1 days - Average rainfall days in May:
14.9 days - Average rainfall days in June:
13.8 days
- Average rainfall days in July:
8.8 days - Average rainfall days in August:
9.3 days - Average rainfall days in September:
8.6 days - Average rainfall days in October:
9.6 days - Average rainfall days in November:
7.8 days - Average rainfall days in December:
6.9 days
The month with the highest number of rainy days is May (14.9 days).
The month with the least rainy days is January (5 days).
Average snowfall
Chester, MT
The month with the highest snowfall is February (5").
The months with the least snowfall are June, July and August (0").
Average snowfall days
Chester, MT
- Average snowfall days in January:
12.5 days - Average snowfall days in February:
12.1 days - Average snowfall days in March:
9.1 days - Average snowfall days in April:
5.8 days - Average snowfall days in May:
0.8 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:
0.5 days - Average snowfall days in October:
3.5 days - Average snowfall days in November:
8.8 days - Average snowfall days in December:
12 days
The month with the highest number of snowfall days is January (12.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight / Average sunshine
Chester, 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 36min - 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 24min
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 24min).
- Average sunshine in January:
5h and 18min - Average sunshine in February:
5h and 24min - Average sunshine in March:
7h and 18min - Average sunshine in April:
9h and 6min - Average sunshine in May:
10h and 18min - Average sunshine in June:
11h and 18min
- Average sunshine in July:
12h and 0min - Average sunshine in August:
11h and 30min - Average sunshine in September:
9h and 54min - Average sunshine in October:
6h and 36min - Average sunshine in November:
6h and 6min - Average sunshine in December:
5h and 18min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 5h and 18min).
Average sunshine days
Chester, MT
- Average sunshine days in January:
17 days - Average sunshine days in February:
14 days - Average sunshine days in March:
13.5 days - Average sunshine days in April:
11.7 days - Average sunshine days in May:
13.5 days - Average sunshine days in June:
14.5 days
- Average sunshine days in July:
18.8 days - Average sunshine days in August:
18.5 days - Average sunshine days in September:
19.5 days - Average sunshine days in October:
17.8 days - Average sunshine days in November:
16.3 days - Average sunshine days in December:
16.5 days
The month with the most sunshine days is September (19.5 days).
The month with the least sunshine days is April (11.7 days).
Average UV index
Chester, 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
Chester, MT
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 15).
Average visibility
Chester, 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).
