Climate and monthly weather forecastSweet Grass, MT
Climate and monthly weather forecast
Weather in January
January, the same as December, in Sweet Grass, Montana, is another subzero cold winter month, with an average temperature varying between 16.2°F (-8.8°C) and 28.9°F (-1.7°C). Sweet Grass marks the start of January with an average high-temperature of a still freezing cold 28.9°F (-1.7°C), hinting at a slight fluctuation from December's 27.1°F (-2.7°C). Weather in January »Weather in February
February, the last month of the winter in Sweet Grass, is another freezing cold month, with an average temperature fluctuating between 28.8°F (-1.8°C) and 15.6°F (-9.1°C). Upon the onset of February, Sweet Grass witnesses an average high-temperature of a still freezing cold 28.8°F (-1.8°C), showing a close resemblance to the prior month. Weather in February »Weather in March
The first month of the spring, March, is an icy month in Sweet Grass, Montana, with an average temperature varying between 39°F (3.9°C) and 24.8°F (-4°C). Sweet Grass's weather in March shows a rise in the average high-temperature, moving up from February's freezing cold 28.8°F (-1.8°C) to a wintry 39°F (3.9°C). Weather in March »Weather in April
April in Sweet Grass, Montana, is a frosty spring month, with an average temperature fluctuating between 49.6°F (9.8°C) and 34°F (1.1°C). With the arrival of April, the average high-temperature transitions from a wintry 39°F (3.9°C) in March to a frosty 49.6°F (9.8°C). Weather in April »Weather in May
May, the last month of the spring in Sweet Grass, is a mild month, with an average temperature varying between 60.3°F (15.7°C) and 42.4°F (5.8°C). May comes with an increase, with the average high-temperature moving from a chilly 49.6°F (9.8°C) in April to a moderate 60.3°F (15.7°C). Weather in May »Weather in June
The first month of the summer, June, is an agreeable month in Sweet Grass, Montana, with an average temperature ranging between max 69.1°F (20.6°C) and min 48.7°F (9.3°C). In Sweet Grass, the onset of June comes with a modest high-temperature shift, transitioning from May's mild 60.3°F (15.7°C) to an agreeable 69.1°F (20.6°C). Weather in June »Weather in July
July in Sweet Grass, Montana, is a warm summer month, with temperature in the range of an average high of 78.8°F (26°C) and an average low of 54.5°F (12.5°C). The warmest temperatures occur during July, when averages reach a peak of 78.8°F (26°C) and a low of 54.5°F (12.5°C). Weather in July »Weather in August
August, the last month of the summer in Sweet Grass, is also a moderately hot month, with temperature in the range of an average low of 55.2°F (12.9°C) and an average high of 78.1°F (25.6°C). The shift into August finds Sweet Grass at an average high-temperature of a still moderately hot 78.1°F (25.6°C), closely comparable to July's conditions. Weather in August »Weather in September
The first month of the autumn, September, is also an enjoyable month in Sweet Grass, Montana, with temperature in the range of an average high of 67.6°F (19.8°C) and an average low of 48.4°F (9.1°C). In Sweet Grass, the beginning of September is marked by a lowered average high-temperature, shifting from August's moderately hot 78.1°F (25.6°C) to a refreshing 67.6°F (19.8°C). Weather in September »Weather in October
October, like September, in Sweet Grass, Montana, is a cool autumn month, with an average temperature varying between 51.4°F (10.8°C) and 36.1°F (2.3°C). October's onset brings a noticeable temperature drop, falling from an enjoyable 67.6°F (19.8°C) in September to a cool 51.4°F (10.8°C). Weather in October »Weather in November
The last month of the autumn, November, is also an icy month in Sweet Grass, Montana, with temperature in the range of an average low of 24.4°F (-4.2°C) and an average high of 38.1°F (3.4°C). A moderate decline in the average high-temperature is seen during November, decreasing from a fresh 51.4°F (10.8°C) in October to a wintry 38.1°F (3.4°C). Weather in November »Weather in December
December, the first month of the winter in Sweet Grass, is still a freezing cold month, with an average temperature ranging between min 15.3°F (-9.3°C) and max 27.1°F (-2.7°C). With an average high-temperature of 27.1°F (-2.7°C) and an average low-temperature of 15.3°F (-9.3°C), December is the coldest month. Weather in December »Updated: Jun 27, 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 79%, January is the most humid month in Sweet Grass.
Throughout the year, there are 70.4 rainfall days, and 8.46" (215mm) of precipitation is accumulated.
January through May, September through December are months with snowfall.
Throughout the year, there are 54.3 snowfall days, and 19.49" (495mm) of snow is accumulated.
January and December, with an average of 5.6h of sunshine, are months with the least sunshine.
The months with the lowest UV index are January through March, October through December, with an average maximum UV index of 2.
February is the month with the most snowfall. Snow falls for 9.7 days and accumulates 3.58" (91mm) 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.
The month with the most rainfall in Sweet Grass is June, when the rain falls for 9.3 days and typically aggregates up to 1.77" (45mm) of precipitation.
June through August are months without snowfall.
June has the longest days of the year, with an average of 16h and 6min of daylight.
Sweet Grass's temperatures peak on average in July, reaching 78.8°F (26°C) at their highest and 54.5°F (12.5°C) at their lowest.
The month with the least rainfall is July, when the rain falls for 5.8 days and typically collects 0.31" (8mm) of precipitation.
With an average of 12h of sunshine, July has the most sunshine of the year.
July is the month with the highest UV index, with an average maximum UV index of 6.
The least humid month is August, with an average relative humidity of 43%.
Sweet Grass witnesses the coldest weather in December, with temperatures averaging a high of 27.1°F (-2.7°C) and a low of 15.3°F (-9.3°C).
With an average of 8h and 18min of daylight, December has the shortest days of the year.
Average temperature
Sweet Grass, MT
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is December (27.1°F).
The month with the highest average low temperature is August (55.2°F).
The coldest month (with the lowest average low temperature) is December (15.3°F).
Average pressure
Sweet Grass, MT
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.01"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.93"Hg - Average pressure in June:
29.87"Hg
- Average pressure in July:
29.91"Hg - Average pressure in August:
29.91"Hg - Average pressure in September:
29.95"Hg - Average pressure in October:
30"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 (29.87"Hg).
Average wind speed
Sweet Grass, MT
- Average wind speed in January:
11.8mph - Average wind speed in February:
10.4mph - Average wind speed in March:
10.6mph - Average wind speed in April:
11.2mph - Average wind speed in May:
9.9mph - Average wind speed in June:
9.9mph
- Average wind speed in July:
8.8mph - Average wind speed in August:
8.8mph - Average wind speed in September:
9.5mph - Average wind speed in October:
10.9mph - Average wind speed in November:
11.4mph - Average wind speed in December:
11.4mph
The windiest month (with the highest average wind speed) is January (11.8mph).
The calmest months (with the lowest average wind speed) are July and August (8.8mph).
Average humidity
Sweet Grass, MT
The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is August (43%).
Average rainfall
Sweet Grass, MT
- Average rainfall in January:
0.35" - Average rainfall in February:
0.47" - Average rainfall in March:
0.55" - Average rainfall in April:
0.94" - Average rainfall in May:
1.3" - Average rainfall in June:
1.77"
- Average rainfall in July:
0.31" - Average rainfall in August:
0.47" - Average rainfall in September:
0.71" - Average rainfall in October:
0.63" - Average rainfall in November:
0.51" - Average rainfall in December:
0.43"
The wettest month (with the highest rainfall) is June (1.77").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days
Sweet Grass, MT
- Average rainfall days in January:
3.9 days - Average rainfall days in February:
3.2 days - Average rainfall days in March:
5.1 days - Average rainfall days in April:
8.3 days - Average rainfall days in May:
10.4 days - Average rainfall days in June:
9.3 days
- Average rainfall days in July:
5.8 days - Average rainfall days in August:
5.8 days - Average rainfall days in September:
6.2 days - Average rainfall days in October:
6.3 days - Average rainfall days in November:
2.6 days - Average rainfall days in December:
3.5 days
The month with the highest number of rainy days is May (10.4 days).
The month with the least rainy days is November (2.6 days).
Average snowfall
Sweet Grass, MT
- Average snowfall in January:
2.28" - Average snowfall in February:
3.58" - Average snowfall in March:
2.05" - Average snowfall in April:
2.44" - Average snowfall in May:
0.79" - Average snowfall in June:
0"
The month with the highest snowfall is February (3.58").
The months with the least snowfall are June, July and August (0").
Average snowfall days
Sweet Grass, MT
- Average snowfall days in January:
8.8 days - Average snowfall days in February:
9.7 days - Average snowfall days in March:
7.9 days - Average snowfall days in April:
5 days - Average snowfall days in May:
1.3 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:
0.8 days - Average snowfall days in October:
4 days - Average snowfall days in November:
6.5 days - Average snowfall days in December:
10.2 days
The month with the highest number of snowfall days is December (10.2 days).
The months with the least snowfall days are July and August (0 days).
Average daylight / Average sunshine
Sweet Grass, 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 48min - 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 48min - Average sunshine in March:
7h and 36min - Average sunshine in April:
9h and 18min - 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 24min - Average sunshine in September:
9h and 36min - Average sunshine in October:
6h and 42min - Average sunshine in November:
6h and 12min - Average sunshine in December:
5h and 36min
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 36min).
Average sunshine days
Sweet Grass, MT
- Average sunshine days in January:
21.1 days - Average sunshine days in February:
17.7 days - Average sunshine days in March:
19.5 days - Average sunshine days in April:
17.4 days - Average sunshine days in May:
17.8 days - Average sunshine days in June:
19.1 days
- Average sunshine days in July:
23.5 days - Average sunshine days in August:
23.3 days - Average sunshine days in September:
22.4 days - Average sunshine days in October:
21.3 days - Average sunshine days in November:
21.6 days - Average sunshine days in December:
19.5 days
The month with the most sunshine days is July (23.5 days).
The month with the least sunshine days is April (17.4 days).
Average UV index
Sweet Grass, 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
Sweet Grass, MT
The month with the most cloud cover is February (Cloud cover 43).
The month with the least cloud cover is July (Cloud cover 15).
Average visibility
Sweet Grass, 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).
