Climate and monthly weather forecastHelmville, MT
Climate and monthly weather forecast
Weather in January
January, like December, is another subzero cold winter month in Helmville, Montana, with an average temperature varying between 28.8°F (-1.8°C) and 14.5°F (-9.7°C). In January, Helmville's weather conditions record an average high-temperature of a still freezing cold 28.8°F (-1.8°C), demonstrating little divergence from the preceding month. Weather in January »Weather in February
February, the last month of the winter in Helmville, is also a subzero cold month, with an average temperature ranging between max 28.6°F (-1.9°C) and min 13.3°F (-10.4°C). As February unfolds, the average high-temperature reaches a still freezing cold 28.6°F (-1.9°C), hinting at a slight fluctuation from the previous month. Weather in February »Weather in March
March, the first month of the spring in Helmville, is a cold month, with an average temperature varying between 20.7°F (-6.3°C) and 37°F (2.8°C). The average high-temperature mildly increases in March, edging from a subzero cold 28.6°F (-1.9°C) in February to a cold 37°F (2.8°C). Weather in March »Weather in April
April in Helmville, Montana, is a frosty spring month, with an average temperature ranging between min 26.1°F (-3.3°C) and max 45.3°F (7.4°C). With the onset of April, Helmville observes a minor temperature ascent, with the average high-temperature adjusting from March's icy 37°F (2.8°C) to a chilly 45.3°F (7.4°C). Weather in April »Weather in May
The last month of the spring, May, is a refreshing month in Helmville, Montana, with an average temperature fluctuating between 33.1°F (0.6°C) and 57.4°F (14.1°C). Helmville's May weather brings a rise in high-temperatures, moving from a frosty 45.3°F (7.4°C) in April to a moderate 57.4°F (14.1°C). Weather in May »Weather in June
June, the first month of the summer in Helmville, is an enjoyable month, with an average temperature ranging between max 66.7°F (19.3°C) and min 39.9°F (4.4°C). Helmville's June weather shows an increase in high-temperatures, moving from May's refreshing 57.4°F (14.1°C) to an enjoyable 66.7°F (19.3°C). Weather in June »Weather in July
July is a warm summer month in Helmville, Montana, with temperature in the range of an average high of 78.1°F (25.6°C) and an average low of 46°F (7.8°C). July, on average, is the warmest month, registering a high temperature of 78.1°F (25.6°C) and a low of 46°F (7.8°C). Weather in July »Weather in August
August, the last month of the summer in Helmville, is another warm month, with an average temperature fluctuating between 46.6°F (8.1°C) and 77°F (25°C). August begins with an average high-temperature of a still warm 77°F (25°C), reflecting close similarity to the preceding month. Weather in August »Weather in September
The first month of the autumn, September, is also an enjoyable month in Helmville, Montana, with an average temperature ranging between min 40.3°F (4.6°C) and max 66.4°F (19.1°C). In September, the meteorological conditions alter, with the average high-temperature shifting from a warm 77°F (25°C) in August to a refreshing 66.4°F (19.1°C). Weather in September »Weather in October
October, the same as September, in Helmville, Montana, is a frosty autumn month, with an average temperature varying between 49.8°F (9.9°C) and 30°F (-1.1°C). Helmville, Montana, sees a considerable decrease in average high-temperatures during October, falling from a comfortable 66.4°F (19.1°C) in September to a chilly 49.8°F (9.9°C). Weather in October »Weather in November
November, the last month of the autumn in Helmville, is also a wintry month, with an average temperature ranging between max 36.3°F (2.4°C) and min 20.3°F (-6.5°C). Helmville experiences a temperature shift at the start of November, with average high-temperatures adjusting from a chilly 49.8°F (9.9°C) in October to an icy 36.3°F (2.4°C). Weather in November »Weather in December
The first month of the winter, December, is also a subzero cold month in Helmville, Montana, with an average temperature fluctuating between 12.6°F (-10.8°C) and 26.6°F (-3°C). December is the coldest month of the year, registering average temperatures as high as 26.6°F (-3°C) and as low as 12.6°F (-10.8°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
The months with the highest humidity are January and February, with an average relative humidity of 89%.
In Helmville, during the entire year, the rain falls for 114.8 days and collects up to 12.13" (308mm) of precipitation.
January through June, September through December are months with snowfall.
Throughout the year, there are 86.9 snowfall days, and 39.96" (1015mm) of snow is accumulated.
January and December, with an average of 5.6h of sunshine, are months with the least sunshine.
January is the month with the lowest UV index, with an average maximum UV index of 1.
February is the month with the most snowfall. Snow falls for 18.1 days and accumulates 9.76" (248mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Helmville, Montana, 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 13.3 days and typically aggregates up to 1.81" (46mm) of precipitation.
With an average of 15h and 48min of daylight, June has the longest days of the year in Helmville, Montana.
July, recognised by an average high temperature of 78.1°F (25.6°C) and a low of 46°F (7.8°C), is Helmville's warmest month.
The months with the lowest humidity in Helmville are July and August, with an average relative humidity of 49%.
In Helmville, snow does not fall in July and August.
With an average of 11.9h of sunshine, July has the most sunshine of the year in Helmville, Montana.
With an average maximum UV index of 5, July is the month with the highest UV index in Helmville.
August through October are months with the least rain when the rain falls for 7 days and typically aggregates up to 0.59" (15mm) of rain.
The coldest period tends to be December, when average temperatures fluctuate between a high of 26.6°F (-3°C) and a low of 12.6°F (-10.8°C).
With an average of 8h and 36min of daylight, December has the shortest days of the year in Helmville.
Average temperature
Helmville, MT
The warmest month (with the highest average high temperature) is July (78.1°F).
The month with the lowest average high temperature is December (26.6°F).
The month with the highest average low temperature is August (46.6°F).
The coldest month (with the lowest average low temperature) is December (12.6°F).
Average pressure
Helmville, MT
- Average pressure in January:
30.19"Hg - Average pressure in February:
30.13"Hg - Average pressure in March:
30.04"Hg - Average pressure in April:
29.99"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.96"Hg - Average pressure in September:
29.98"Hg - Average pressure in October:
30.05"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.18"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Helmville, MT
- Average wind speed in January:
5.7mph - Average wind speed in February:
5.5mph - Average wind speed in March:
5.6mph - Average wind speed in April:
6mph - Average wind speed in May:
5.4mph - Average wind speed in June:
5.5mph
- Average wind speed in July:
5mph - Average wind speed in August:
4.7mph - Average wind speed in September:
5.2mph - Average wind speed in October:
5.6mph - Average wind speed in November:
5.7mph - Average wind speed in December:
5.5mph
The windiest month (with the highest average wind speed) is April (6mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity
Helmville, MT
The months with the highest relative humidity are January and February (89%).
The months with the lowest relative humidity are July and August (49%).
Average rainfall
Helmville, MT
- Average rainfall in January:
1.02" - Average rainfall in February:
1.38" - Average rainfall in March:
1.14" - Average rainfall in April:
1.34" - Average rainfall in May:
1.3" - Average rainfall in June:
1.81"
- Average rainfall in July:
0.75" - Average rainfall in August:
0.59" - Average rainfall in September:
0.59" - Average rainfall in October:
0.59" - Average rainfall in November:
0.71" - Average rainfall in December:
0.91"
The wettest month (with the highest rainfall) is June (1.81").
The driest months (with the least rainfall) are August, September and October (0.59").
Average rainfall days
Helmville, MT
- Average rainfall days in January:
9.7 days - Average rainfall days in February:
9.4 days - Average rainfall days in March:
11.4 days - Average rainfall days in April:
12.8 days - Average rainfall days in May:
13 days - Average rainfall days in June:
13.3 days
- Average rainfall days in July:
7.6 days - Average rainfall days in August:
7 days - Average rainfall days in September:
6.9 days - Average rainfall days in October:
8.4 days - Average rainfall days in November:
6.5 days - Average rainfall days in December:
8.8 days
The month with the highest number of rainy days is June (13.3 days).
The month with the least rainy days is November (6.5 days).
Average snowfall
Helmville, MT
- Average snowfall in January:
6.85" - Average snowfall in February:
9.76" - Average snowfall in March:
5.87" - Average snowfall in April:
4.09" - Average snowfall in May:
0.55" - Average snowfall in June:
0.98"
The month with the highest snowfall is February (9.76").
The months with the least snowfall are July and August (0").
Average snowfall days
Helmville, MT
- Average snowfall days in January:
16.8 days - Average snowfall days in February:
18.1 days - Average snowfall days in March:
13.2 days - Average snowfall days in April:
7.9 days - Average snowfall days in May:
1.6 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:
0.5 days - Average snowfall days in October:
3.9 days - Average snowfall days in November:
9.3 days - Average snowfall days in December:
15.5 days
The month with the highest number of snowfall days is February (18.1 days).
The months with the least snowfall days are July and August (0 days).
Average daylight / Average sunshine
Helmville, MT
- Average daylight in January:
9h and 0min - Average daylight in February:
10h and 18min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 36min - Average daylight in May:
15h and 6min - Average daylight in June:
15h and 48min
- Average daylight in July:
15h and 24min - Average daylight in August:
14h and 6min - Average daylight in September:
12h and 30min - Average daylight in October:
10h and 54min - Average daylight in November:
9h and 24min - Average daylight in December:
8h and 36min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in January:
5h and 36min - Average sunshine in February:
6h and 6min - Average sunshine in March:
7h and 42min - Average sunshine in April:
9h and 18min - Average sunshine in May:
10h and 42min - Average sunshine in June:
11h and 12min
- Average sunshine in July:
11h and 54min - Average sunshine in August:
11h and 42min - Average sunshine in September:
9h and 48min - Average sunshine in October:
7h and 12min - Average sunshine in November:
6h and 24min - Average sunshine in December:
5h and 36min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The months with the least sunshine are January and December (Average sunshine: 5h and 36min).
Average sunshine days
Helmville, MT
- Average sunshine days in January:
12.8 days - Average sunshine days in February:
8.5 days - Average sunshine days in March:
11.5 days - Average sunshine days in April:
12.5 days - Average sunshine days in May:
15.2 days - Average sunshine days in June:
13.5 days
- Average sunshine days in July:
20.7 days - Average sunshine days in August:
21.4 days - Average sunshine days in September:
21.9 days - Average sunshine days in October:
20 days - Average sunshine days in November:
18 days - Average sunshine days in December:
14.6 days
The month with the most sunshine days is September (21.9 days).
The month with the least sunshine days is February (8.5 days).
Average UV index
Helmville, MT
The month with the highest UV index is July (UV index 5).
The month with the lowest UV index is January (UV index 1).
Average cloud cover
Helmville, MT
The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are July and August (Cloud cover 13).
Average visibility
Helmville, MT
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February and December (4mi).
