Climate and monthly weather forecastDayton, MT
Climate and monthly weather forecast
Weather in January
January, the same as December, in Dayton, Montana, is a freezing cold winter month, with an average temperature ranging between max 28.6°F (-1.9°C) and min 16.2°F (-8.8°C). Dayton records a slight change with January's average high-temperatures adjusting to a still freezing cold 28.6°F (-1.9°C) from December's 27.1°F (-2.7°C). Weather in January »Weather in February
February, the last month of the winter in Dayton, is another freezing cold month, with an average temperature fluctuating between 29.7°F (-1.3°C) and 16.3°F (-8.7°C). Dayton transitions into February recording an average high-temperature of a still subzero cold 29.7°F (-1.3°C), closely aligning with the preceding month's temperature. Weather in February »Weather in March
March, the first month of the spring in Dayton, is an icy month, with an average temperature fluctuating between 38.3°F (3.5°C) and 23.4°F (-4.8°C). March's arrival signals a subtle increase in average high-temperatures, moving from February's subzero cold 29.7°F (-1.3°C) to a cold 38.3°F (3.5°C). Weather in March »Weather in April
April is a frosty spring month in Dayton, Montana, with an average temperature varying between 29.7°F (-1.3°C) and 47.8°F (8.8°C). With the onset of April, the average high-temperature slightly shifts from March's cold 38.3°F (3.5°C) to a chilly 47.8°F (8.8°C). Weather in April »Weather in May
May, the last month of the spring in Dayton, is an enjoyable month, with an average temperature ranging between min 36.7°F (2.6°C) and max 60.8°F (16°C). Dayton experiences a temperature shift with the start of May, with average high-temperatures moving from a frosty 47.8°F (8.8°C) in April to a comfortable 60.8°F (16°C). Weather in May »Weather in June
June, the first month of the summer in Dayton, is a pleasant month, with an average temperature fluctuating between 68°F (20°C) and 42.8°F (6°C). The onset of June introduces a subtle rise in the average high-temperature, nudging from a refreshing 60.8°F (16°C) in May to an agreeable 68°F (20°C). Weather in June »Weather in July
July is a warm summer month in Dayton, Montana, with an average temperature ranging between max 79.3°F (26.3°C) and min 48.4°F (9.1°C). July, with its average high-temperature of 79.3°F (26.3°C) and an average low-temperature of 48.4°F (9.1°C), holds the record as the warmest month. Weather in July »Weather in August
The last month of the summer, August, is another warm month in Dayton, Montana, with an average temperature fluctuating between 78.4°F (25.8°C) and 48.2°F (9°C). In Dayton, August's average high-temperature stands at a still warm 78.4°F (25.8°C), closely related to the preceding month. Weather in August »Weather in September
The first month of the autumn, September, is still a refreshing month in Dayton, Montana, with an average temperature fluctuating between 67.1°F (19.5°C) and 41.5°F (5.3°C). The shift to September brings a decrease in the average high-temperature, falling from a warm 78.4°F (25.8°C) in August to an enjoyable 67.1°F (19.5°C). Weather in September »Weather in October
October, the same as September, is a cool autumn month in Dayton, Montana, with temperature in the range of an average high of 50.4°F (10.2°C) and an average low of 32.7°F (0.4°C). The shift from September to October brings a noticeable decrease in the average high-temperature, dropping from a refreshing 67.1°F (19.5°C) to a fresh 50.4°F (10.2°C). Weather in October »Weather in November
The last month of the autumn, November, is another cold month in Dayton, Montana, with an average temperature varying between 24.1°F (-4.4°C) and 36°F (2.2°C). November ushers in a slight temperature change, with average high-temperatures reducing from October's fresh 50.4°F (10.2°C) to a wintry 36°F (2.2°C). Weather in November »Weather in December
December, the first month of the winter in Dayton, is still a freezing cold month, with an average temperature fluctuating between 16.2°F (-8.8°C) and 27.1°F (-2.7°C). In Dayton, December is the month with the lowest recorded average temperatures, measuring a high of 27.1°F (-2.7°C) and a low of 16.2°F (-8.8°C). Weather in December »Updated: Aug 24, 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 93%, January is the most humid month.
Throughout the year, there are 129.8 rainfall days, and 16.42" (417mm) of precipitation is accumulated.
Months with snowfall are January through June, September through December.
Throughout the year, there are 117.4 snowfall days, and 58.62" (1489mm) of snow is accumulated.
With an average of 3.5h of sunshine, January has the least sunshine of the year.
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 1.
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 14.9 days and typically aggregates up to 1.89" (48mm) of precipitation.
With an average of 16h and 0min of daylight, June has the longest days of the year.
July is the month when Dayton's temperatures reach their peak, with averages of 79.3°F (26.3°C) and lows of 48.4°F (9.1°C).
The months with the lowest humidity are July and August, with an average relative humidity of 52%.
The month with the least rainfall is July, when the rain falls for 8 days and typically collects 0.59" (15mm) of precipitation.
In Dayton, snow does not fall in July and August.
The month with the most sunshine is July, with an average of 11.7h of sunshine.
The month with the highest UV index is July, with an average maximum UV index of 6.
During the coldest month in Dayton, December, temperatures average a high of 27.1°F (-2.7°C) and a low of 16.2°F (-8.8°C).
December is the month with the most snowfall. Snow falls for 21.7 days and accumulates 12.36" (314mm) of snow.
December has the shortest days of the year, with an average of 8h and 30min of daylight.
Average temperature
Dayton, MT
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is December (27.1°F).
The month with the highest average low temperature is July (48.4°F).
The coldest months (with the lowest average low temperature) are January and December (16.2°F).
Average pressure
Dayton, MT
- Average pressure in January:
30.17"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.03"Hg - Average pressure in April:
29.99"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.95"Hg - Average pressure in August:
29.94"Hg - Average pressure in September:
29.98"Hg - Average pressure in October:
30.05"Hg - Average pressure in November:
30.1"Hg - Average pressure in December:
30.16"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Dayton, MT
- Average wind speed in January:
3.7mph - Average wind speed in February:
4mph - Average wind speed in March:
4.3mph - Average wind speed in April:
4.7mph - Average wind speed in May:
4.3mph - Average wind speed in June:
4.3mph
- Average wind speed in July:
3.9mph - Average wind speed in August:
3.6mph - Average wind speed in September:
3.7mph - Average wind speed in October:
4mph - Average wind speed in November:
4mph - Average wind speed in December:
3.6mph
The windiest month (with the highest average wind speed) is April (4.7mph).
The calmest months (with the lowest average wind speed) are August and December (3.6mph).
Average humidity
Dayton, MT
The month with the highest relative humidity is January (93%).
The months with the lowest relative humidity are July and August (52%).
Average rainfall
Dayton, MT
- Average rainfall in January:
1.42" - Average rainfall in February:
1.5" - Average rainfall in March:
1.65" - Average rainfall in April:
1.73" - Average rainfall in May:
1.5" - Average rainfall in June:
1.89"
- Average rainfall in July:
0.59" - Average rainfall in August:
0.63" - Average rainfall in September:
0.98" - Average rainfall in October:
1.54" - Average rainfall in November:
1.42" - Average rainfall in December:
1.57"
The wettest month (with the highest rainfall) is June (1.89").
The driest month (with the least rainfall) is July (0.59").
Average rainfall days
Dayton, MT
- Average rainfall days in January:
8 days - Average rainfall days in February:
7.8 days - Average rainfall days in March:
13.8 days - Average rainfall days in April:
15.9 days - Average rainfall days in May:
14.1 days - Average rainfall days in June:
14.9 days
- Average rainfall days in July:
8 days - Average rainfall days in August:
7.1 days - Average rainfall days in September:
10.2 days - Average rainfall days in October:
13 days - Average rainfall days in November:
10.5 days - Average rainfall days in December:
6.5 days
The month with the highest number of rainy days is April (15.9 days).
The month with the least rainy days is December (6.5 days).
Average snowfall
Dayton, MT
- Average snowfall in January:
11.14" - Average snowfall in February:
11.46" - Average snowfall in March:
9.06" - Average snowfall in April:
4.25" - Average snowfall in May:
0.83" - Average snowfall in June:
0.04"
The month with the highest snowfall is December (12.36").
The months with the least snowfall are July and August (0").
Average snowfall days
Dayton, MT
- Average snowfall days in January:
22.3 days - Average snowfall days in February:
20.9 days - Average snowfall days in March:
18.9 days - Average snowfall days in April:
9.8 days - Average snowfall days in May:
2.3 days - Average snowfall days in June:
0.1 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0.4 days - Average snowfall days in October:
5 days - Average snowfall days in November:
16 days - Average snowfall days in December:
21.7 days
The month with the highest number of snowfall days is January (22.3 days).
The months with the least snowfall days are July and August (0 days).
Average daylight / Average sunshine
Dayton, MT
- Average daylight in January:
8h and 54min - Average daylight in February:
10h and 18min - Average daylight in March:
11h and 54min - Average daylight in April:
13h and 42min - Average daylight in May:
15h and 12min - Average daylight in June:
16h and 0min
- Average daylight in July:
15h and 36min - Average daylight in August:
14h and 12min - Average daylight in September:
12h and 36min - Average daylight in October:
10h and 48min - Average daylight in November:
9h and 18min - Average daylight in December:
8h and 30min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in January:
3h and 30min - Average sunshine in February:
4h and 30min - Average sunshine in March:
6h and 6min - Average sunshine in April:
8h and 12min - Average sunshine in May:
10h and 6min - Average sunshine in June:
10h and 18min
- Average sunshine in July:
11h and 42min - Average sunshine in August:
11h and 36min - Average sunshine in September:
9h and 12min - Average sunshine in October:
6h and 30min - Average sunshine in November:
5h and 6min - Average sunshine in December:
3h and 48min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days
Dayton, MT
- Average sunshine days in January:
8.9 days - Average sunshine days in February:
7.1 days - Average sunshine days in March:
7.5 days - Average sunshine days in April:
9.1 days - Average sunshine days in May:
14.5 days - Average sunshine days in June:
13.2 days
- Average sunshine days in July:
20.8 days - Average sunshine days in August:
20 days - Average sunshine days in September:
18.6 days - Average sunshine days in October:
14.6 days - Average sunshine days in November:
10.1 days - Average sunshine days in December:
9.5 days
The month with the most sunshine days is July (20.8 days).
The month with the least sunshine days is February (7.1 days).
Average UV index
Dayton, MT
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover
Dayton, MT
The month with the most cloud cover is January (Cloud cover 64).
The months with the least cloud cover are July and August (Cloud cover 15).
Average visibility
Dayton, MT
The months with the highest visibility are May, June, July, August, September and October (6mi).
The month with the lowest visibility is January (3mi).
