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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, like December, is another subzero cold winter month in Decker, Montana, with an average temperature fluctuating between 16.2°F (-8.8°C) and 31.8°F (-0.1°C). Decker records an average high-temperature of a still freezing cold 31.8°F (-0.1°C) as January arrives, nearly mirroring the previous month's climate. Weather in January »
Weather in February
February, the last month of the winter in Decker, is another freezing cold month, with an average temperature fluctuating between 16.2°F (-8.8°C) and 31.6°F (-0.2°C). The arrival of February brings an average high-temperature of a still freezing cold 31.6°F (-0.2°C), subtly diverging from January's 31.8°F (-0.1°C). Weather in February »
Weather in March
March, the first month of the spring in Decker, is a chilly month, with an average temperature varying between 45°F (7.2°C) and 28.2°F (-2.1°C). In March, the meteorological conditions change with the average high-temperature moving from a subzero cold 31.6°F (-0.2°C) in February to a frosty 45°F (7.2°C). Weather in March »
Weather in April
April is a fresh spring month in Decker, Montana, with temperature in the range of an average high of 53.1°F (11.7°C) and an average low of 34.2°F (1.2°C). Entering April, Decker notices a subtle temperature elevation, with the average high-temperature advancing from March's chilly 45°F (7.2°C) to a cool 53.1°F (11.7°C). Weather in April »
Weather in May
The last month of the spring, May, is an enjoyable month in Decker, Montana, with temperature in the range of an average low of 43.5°F (6.4°C) and an average high of 63.7°F (17.6°C). The commencement of May sees a shift in the average high-temperature, moving from a cool 53.1°F (11.7°C) in April to a comfortable 63.7°F (17.6°C). Weather in May »
Weather in June
June, the first month of the summer in Decker, is a moderately hot month, with an average temperature fluctuating between 75.7°F (24.3°C) and 52.9°F (11.6°C). Decker in June experiences an increase in the average high-temperature, moving from May's comfortable 63.7°F (17.6°C) to a moderately hot 75.7°F (24.3°C). Weather in June »
Weather in July
July, like June, in Decker, Montana, is another warm summer month, with an average temperature varying between 85.5°F (29.7°C) and 61.5°F (16.4°C). July, recording an average high temperature of 85.5°F (29.7°C) and a low temperature of 61.5°F (16.4°C), is Decker's warmest month. The average heat index in July is estimated at a hot 86°F (30°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Decker, Montana, with an average temperature ranging between min 60.4°F (15.8°C) and max 83.7°F (28.7°C). Decker records an average high-temperature of a still warm 83.7°F (28.7°C) as August arrives, nearly mirroring the previous month's climate. Weather in August »
Weather in September
September, the first month of the autumn in Decker, is also a moderately hot month, with an average temperature varying between 52.7°F (11.5°C) and 74.1°F (23.4°C). The onset of September is marked by a decrease in temperature, transitioning from a warm 83.7°F (28.7°C) in August to a still moderately hot 74.1°F (23.4°C). Weather in September »
Weather in October
October, like September, is another mild autumn month in Decker, Montana, with temperature in the range of an average low of 39°F (3.9°C) and an average high of 56.8°F (13.8°C). October's arrival signals a distinct temperature shift, dropping from a warm 74.1°F (23.4°C) in September to a mild 56.8°F (13.8°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Decker, Montana, with an average temperature ranging between max 43.3°F (6.3°C) and min 27.1°F (-2.7°C). In the transition to November, Decker observes a drop in the average high-temperature, moving from a refreshing 56.8°F (13.8°C) in October to a chilly 43.3°F (6.3°C). Weather in November »
Weather in December
December, the first month of the winter in Decker, is also a subzero cold month, with an average temperature varying between 16.7°F (-8.5°C) and 31.1°F (-0.5°C). December, with an average high of 31.1°F (-0.5°C) and a low of 16.7°F (-8.5°C), signifies the coldest month of the year. Weather in December »
[Resources]Frequently asked questions
What is the most humid month in Decker?
The months with the highest humidity are January and February, with an average relative humidity of 79%.
How many days does it rain in Decker?
In Decker, Montana, during the entire year, the rain falls for 127.6 days and collects up to 14.25" (362mm) of precipitation.
When does it snow in Decker?
January through May, September through December are months with snowfall.
How many days does it snow in Decker?
Throughout the year, in Decker, there are 65.3 snowfall days, and 28.82" (732mm) of snow is accumulated.
What is the month with the lowest UV index in Decker?
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.
What is the snowiest month in Decker?
February is the month with the most snowfall. Snow falls for 14.3 days and accumulates 5.2" (132mm) of snow.
What is the month with the least sunshine in Decker?
With an average of 5.7h of sunshine, February has the least sunshine of the year in Decker, Montana.
When is Daylight Saving Time (DST) in Decker?
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 rainiest month in Decker?
May is the month with the most rainfall in Decker, Montana. Rain falls for 18 days and accumulates 2.64" (67mm) of precipitation.
When it does not snow in Decker?
June through August are months without snowfall.
When are the longest days in Decker?
The month with the longest days in Decker is June, with an average of 15h and 36min of daylight.
What part of the year is the hottest in Decker?
July is the warmest month, exhibiting average temperatures of 85.5°F (29.7°C) at the peak and 61.5°F (16.4°C) at the base.
What is the month with the most sunshine in Decker?
July and August, with an average of 11.9h of sunshine, are months with the most sunshine.
When is the highest UV index in Decker?
The month with the highest UV index in Decker, Montana, is July, with an average maximum UV index of 7.
What is the least humid month in Decker?
The least humid month in Decker, Montana, is August, with an average relative humidity of 40%.
What are the coldest months in Decker?
December stands out as Decker's coldest month, with temperatures ranging between an average high of 31.1°F (-0.5°C) and a low of 16.7°F (-8.5°C).
What is the driest month in Decker?
The month with the least rainfall is December, when the rain falls for 6.8 days and typically collects 0.67" (17mm) of precipitation.
What is the month with the shortest days in Decker?
December has the shortest days of the year in Decker, Montana, with an average of 8h and 48min of daylight.
Average temperature
Decker, MT
The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is December (31.1°F).
The month with the highest average low temperature is July (61.5°F).
The coldest months (with the lowest average low temperature) are January and February (16.2°F).
Average pressure
Decker, MT
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
29.99"Hg - Average pressure in April:
29.92"Hg - Average pressure in May:
29.91"Hg - Average pressure in June:
29.85"Hg
- Average pressure in July:
29.89"Hg - Average pressure in August:
29.9"Hg - Average pressure in September:
29.93"Hg - Average pressure in October:
29.99"Hg - Average pressure in November:
30.05"Hg - Average pressure in December:
30.12"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
Decker, MT
- Average wind speed in January:
7.4mph - Average wind speed in February:
7mph - Average wind speed in March:
7.6mph - Average wind speed in April:
9.1mph - Average wind speed in May:
8.6mph - Average wind speed in June:
7.8mph
- Average wind speed in July:
6.8mph - Average wind speed in August:
7mph - Average wind speed in September:
7.6mph - Average wind speed in October:
8.3mph - Average wind speed in November:
7mph - Average wind speed in December:
6.8mph
The windiest month (with the highest average wind speed) is April (9.1mph).
The calmest months (with the lowest average wind speed) are July and December (6.8mph).
Average humidity
Decker, MT
The months with the highest relative humidity are January and February (79%).
The month with the lowest relative humidity is August (40%).
Average rainfall
Decker, MT
- Average rainfall in January:
0.75" - Average rainfall in February:
0.83" - Average rainfall in March:
1.14" - Average rainfall in April:
2.01" - Average rainfall in May:
2.64" - Average rainfall in June:
1.46"
- Average rainfall in July:
1.14" - Average rainfall in August:
1.1" - Average rainfall in September:
0.83" - Average rainfall in October:
0.94" - Average rainfall in November:
0.75" - Average rainfall in December:
0.67"
The wettest month (with the highest rainfall) is May (2.64").
The driest month (with the least rainfall) is December (0.67").
Average rainfall days
Decker, MT
- Average rainfall days in January:
6.3 days - Average rainfall days in February:
7.7 days - Average rainfall days in March:
11.8 days - Average rainfall days in April:
15.3 days - Average rainfall days in May:
18 days - Average rainfall days in June:
13.8 days
- Average rainfall days in July:
10.7 days - Average rainfall days in August:
11.6 days - Average rainfall days in September:
8.6 days - Average rainfall days in October:
9.8 days - Average rainfall days in November:
7.2 days - Average rainfall days in December:
6.8 days
The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is January (6.3 days).
Average snowfall
Decker, MT
- Average snowfall in January:
4.45" - Average snowfall in February:
5.2" - Average snowfall in March:
4.29" - Average snowfall in April:
5.08" - Average snowfall in May:
0.87" - Average snowfall in June:
0"
The month with the highest snowfall is February (5.2").
The months with the least snowfall are June, July and August (0").
Average snowfall days
Decker, MT
- Average snowfall days in January:
12 days - Average snowfall days in February:
14.3 days - Average snowfall days in March:
9.5 days - Average snowfall days in April:
6.3 days - Average snowfall days in May:
1.3 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:
2.8 days - Average snowfall days in November:
7.7 days - Average snowfall days in December:
11.2 days
The month with the highest number of snowfall days is February (14.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight / Average sunshine
Decker, MT
- Average daylight in January:
9h and 1min - Average daylight in February:
10h and 2min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 3min - Average daylight in May:
14h and 5min - Average daylight in June:
15h and 4min
- Average daylight in July:
15h and 1min - Average daylight in August:
14h and 0min - Average daylight in September:
12h and 3min - Average daylight in October:
10h and 5min - Average daylight in November:
9h and 4min - Average daylight in December:
8h and 5min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in January:
6h and 1min - Average sunshine in February:
5h and 4min - Average sunshine in March:
8h and 1min - Average sunshine in April:
9h and 5min - Average sunshine in May:
10h and 3min - Average sunshine in June:
11h and 4min
- Average sunshine in July:
11h and 5min - Average sunshine in August:
11h and 5min - Average sunshine in September:
10h and 5min - Average sunshine in October:
6h and 5min - Average sunshine in November:
6h and 4min - Average sunshine in December:
6h and 1min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 42min).
Average sunshine days
Decker, MT
- Average sunshine days in January:
15.3 days - Average sunshine days in February:
11.5 days - Average sunshine days in March:
12 days - Average sunshine days in April:
10.3 days - Average sunshine days in May:
9.6 days - Average sunshine days in June:
12.2 days
- Average sunshine days in July:
13.6 days - Average sunshine days in August:
14.4 days - Average sunshine days in September:
18.2 days - Average sunshine days in October:
17.1 days - Average sunshine days in November:
16.9 days - Average sunshine days in December:
16.5 days
The month with the most sunshine days is September (18.2 days).
The month with the least sunshine days is May (9.6 days).
Average UV index
Decker, MT
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover
Decker, MT
The month with the most cloud cover is February (Cloud cover 41).
The months with the least cloud cover are July and August (Cloud cover 14).
Average visibility
Decker, 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).
Decker, Montana, USA
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