Expand
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 Grantsdale, Montana, with temperature in the range of an average high of 28.8°F (-1.8°C) and an average low of 16.2°F (-8.8°C). January registers an average high-temperature of a still subzero cold 28.8°F (-1.8°C), slightly varied from December's 26.8°F (-2.9°C). Weather in January »
Weather in February
February, the last month of the winter in Grantsdale, is also a subzero cold month, with an average temperature ranging between max 28.8°F (-1.8°C) and min 15.1°F (-9.4°C). The shift into February finds Grantsdale at an average high-temperature of a still freezing cold 28.8°F (-1.8°C), corresponding to January's conditions. Weather in February »
Weather in March
The first month of the spring, March, is a cold month in Grantsdale, Montana, with temperature in the range of an average high of 36°F (2.2°C) and an average low of 21°F (-6.1°C). As February transitions into March, a subtle temperature shift is observed, with average highs adjusting from a freezing cold 28.8°F (-1.8°C) to a wintry 36°F (2.2°C). Weather in March »
Weather in April
April in Grantsdale, Montana, is a frosty spring month, with an average temperature fluctuating between 25.9°F (-3.4°C) and 43.5°F (6.4°C). With the onset of April, Grantsdale's average high-temperature experiences a slight rise, moving from March's cold 36°F (2.2°C) to a frosty 43.5°F (6.4°C). Weather in April »
Weather in May
The last month of the spring, May, is a refreshing month in Grantsdale, Montana, with an average temperature fluctuating between 56.7°F (13.7°C) and 33.4°F (0.8°C). In Grantsdale, the average high-temperature in May rises, from a frosty 43.5°F (6.4°C) in April, to a mild 56.7°F (13.7°C). Weather in May »
Weather in June
June, the first month of the summer in Grantsdale, is a comfortable month, with an average temperature fluctuating between 40.6°F (4.8°C) and 65.3°F (18.5°C). The shift into June is characterized by a subtle rise in the average high-temperature, transitioning from May's mild 56.7°F (13.7°C) to a still refreshing 65.3°F (18.5°C). Weather in June »
Weather in July
July is a moderately hot summer month in Grantsdale, Montana, with an average temperature ranging between min 46.8°F (8.2°C) and max 77°F (25°C). Grantsdale's warmest month, July, registers temperatures that range from a high of 77°F (25°C) to a low of 46.8°F (8.2°C). Weather in July »
Weather in August
August, the last month of the summer in Grantsdale, is another warm month, with an average temperature ranging between max 76.3°F (24.6°C) and min 46.9°F (8.3°C). Shifting into August, Grantsdale records an average high-temperature of a still moderately hot 76.3°F (24.6°C), presenting minor fluctuations compared to the previous month. Weather in August »
Weather in September
September, the first month of the autumn in Grantsdale, is still a refreshing month, with an average temperature ranging between max 66.2°F (19°C) and min 39.9°F (4.4°C). The move into September indicates a reduction in the average high-temperature, down from August's warm 76.3°F (24.6°C) to a refreshing 66.2°F (19°C). Weather in September »
Weather in October
October, like September, in Grantsdale, Montana, is another fresh autumn month, with an average temperature varying between 30.4°F (-0.9°C) and 50°F (10°C). As September transitions into October, Grantsdale sees a clear drop in the average high-temperature, declining from a comfortable 66.2°F (19°C) to a fresh 50°F (10°C). Weather in October »
Weather in November
The last month of the autumn, November, is another cold month in Grantsdale, Montana, with an average temperature varying between 21.9°F (-5.6°C) and 36.1°F (2.3°C). Arrival of November comes with a reduction in the average high-temperature, falling from a fresh 50°F (10°C) in October to a wintry 36.1°F (2.3°C). Weather in November »
Weather in December
December, the first month of the winter in Grantsdale, is also a subzero cold month, with an average temperature ranging between min 14°F (-10°C) and max 26.8°F (-2.9°C). In Grantsdale, December is the month with the lowest recorded average temperatures, measuring a high of 26.8°F (-2.9°C) and a low of 14°F (-10°C). Weather in December »
Updated: Aug 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
What is the most humid month?
The most humid month is January, with an average relative humidity of 89%.
How much does it rain in Grantsdale?
Throughout the year, there are 163.6 rainfall days, and 20.83" (529mm) of precipitation is accumulated.
When does it snow?
January through May, September through December are months with snowfall in Grantsdale.
How much does it snow?
Throughout the year, there are 101.1 snowfall days, and 59.17" (1503mm) of snow is accumulated.
What is the month with the least sunshine?
The months with the least sunshine are January and December, with an average of 5.4h of sunshine.
What is the wettest month?
The months with the most rainfall are February and April, with an average 2.36" (60mm) of precipitation.
What is the snowiest month?
February is the month with the most snowfall in Grantsdale. Snow falls for 19.3 days and accumulates 13.03" (331mm) of snow.
What is the month with the lowest UV index?
The months with the lowest UV index are February and December, with an average maximum UV index of 1.
When is Daylight Saving Time (DST)?
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.
When it does not snow?
June through August are months without snowfall.
When are the longest days?
The month with the longest days is June, with an average of 15h and 42min of daylight.
What is the hottest time of year?
July, recording an average high temperature of 77°F (25°C) and a low temperature of 46.8°F (8.2°C), is Grantsdale's warmest month.
What are the months with the most sunshine?
The months with the most sunshine are July and August, with an average of 11.7h of sunshine.
When is the highest UV index?
With an average maximum UV index of 5, July is the month with the highest UV index.
What is the least humid month in Grantsdale?
The least humid month is August, with an average relative humidity of 50%.
What is the driest month?
August is the month with the least rainfall. Rain falls for 8.7 days and accumulates 0.75" (19mm) of precipitation.
What are the coldest months?
Grantsdale records the coldest temperatures in December, averaging a high of 26.8°F (-2.9°C) and a low of 14°F (-10°C).
What is the month with the shortest days in Grantsdale?
The month with the shortest days is December, with an average of 8h and 42min of daylight.
Average temperature
Grantsdale, MT
The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is December (26.8°F).
The month with the highest average low temperature is August (46.9°F).
The coldest month (with the lowest average low temperature) is December (14°F).
Average pressure
Grantsdale, MT
- Average pressure in January:
30.21"Hg - Average pressure in February:
30.13"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
30.01"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
29.99"Hg - Average pressure in October:
30.06"Hg - Average pressure in November:
30.13"Hg - Average pressure in December:
30.19"Hg
The month with the highest atmospheric pressure is January (30.21"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Grantsdale, MT
- Average wind speed in January:
5.3mph - Average wind speed in February:
5.1mph - Average wind speed in March:
5mph - Average wind speed in April:
5mph - Average wind speed in May:
4.5mph - Average wind speed in June:
4.5mph
- Average wind speed in July:
4.3mph - Average wind speed in August:
4.1mph - Average wind speed in September:
4.4mph - Average wind speed in October:
4.8mph - Average wind speed in November:
5.2mph - Average wind speed in December:
5.2mph
The windiest month (with the highest average wind speed) is January (5.3mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).
Average humidity
Grantsdale, MT
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (50%).
Average rainfall
Grantsdale, MT
- Average rainfall in January:
2.05" - Average rainfall in February:
2.36" - Average rainfall in March:
2.28" - Average rainfall in April:
2.36" - Average rainfall in May:
1.97" - Average rainfall in June:
2.09"
- Average rainfall in July:
0.79" - Average rainfall in August:
0.75" - Average rainfall in September:
0.98" - Average rainfall in October:
1.46" - Average rainfall in November:
1.77" - Average rainfall in December:
1.97"
The wettest months (with the highest rainfall) are February and April (2.36").
The driest month (with the least rainfall) is August (0.75").
Average rainfall days
Grantsdale, MT
- Average rainfall days in January:
11.9 days - Average rainfall days in February:
12.5 days - Average rainfall days in March:
18.8 days - Average rainfall days in April:
18.5 days - Average rainfall days in May:
19.5 days - Average rainfall days in June:
15.3 days
- Average rainfall days in July:
8 days - Average rainfall days in August:
8.7 days - Average rainfall days in September:
9.9 days - Average rainfall days in October:
14.5 days - Average rainfall days in November:
13.1 days - Average rainfall days in December:
12.9 days
The month with the highest number of rainy days is May (19.5 days).
The month with the least rainy days is July (8 days).
Average snowfall
Grantsdale, MT
- Average snowfall in January:
11.89" - Average snowfall in February:
13.03" - Average snowfall in March:
9.09" - Average snowfall in April:
5.67" - Average snowfall in May:
0.67" - Average snowfall in June:
0"
The month with the highest snowfall is February (13.03").
The months with the least snowfall are June, July and August (0").
Average snowfall days
Grantsdale, MT
- Average snowfall days in January:
18.6 days - Average snowfall days in February:
19.3 days - Average snowfall days in March:
16 days - Average snowfall days in April:
10.3 days - Average snowfall days in May:
2.3 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:
0.4 days - Average snowfall days in October:
3.5 days - Average snowfall days in November:
12.1 days - Average snowfall days in December:
18.6 days
The month with the highest number of snowfall days is February (19.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight / Average sunshine
Grantsdale, 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 4min - Average daylight in May:
15h and 0min - Average daylight in June:
15h and 4min
- Average daylight in July:
15h and 2min - Average daylight in August:
14h and 1min - Average daylight in September:
12h and 3min - Average daylight in October:
10h and 5min - Average daylight in November:
9h and 2min - Average daylight in December:
8h and 4min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in January:
5h and 2min - Average sunshine in February:
6h and 1min - Average sunshine in March:
7h and 1min - Average sunshine in April:
8h and 5min - Average sunshine in May:
10h and 2min - Average sunshine in June:
11h and 0min
- Average sunshine in July:
11h and 4min - Average sunshine in August:
11h and 4min - Average sunshine in September:
9h and 3min - Average sunshine in October:
7h and 2min - Average sunshine in November:
6h and 1min - Average sunshine in December:
5h and 2min
The months with the most sunshine are July and August (Average sunshine: 11h and 42min).
The months with the least sunshine are January and December (Average sunshine: 5h and 24min).
Average sunshine days
Grantsdale, MT
- Average sunshine days in January:
10.2 days - Average sunshine days in February:
5.6 days - Average sunshine days in March:
6.3 days - Average sunshine days in April:
6.9 days - Average sunshine days in May:
8.5 days - Average sunshine days in June:
11.1 days
- Average sunshine days in July:
18.9 days - Average sunshine days in August:
17.4 days - Average sunshine days in September:
16.1 days - Average sunshine days in October:
13.1 days - Average sunshine days in November:
10.4 days - Average sunshine days in December:
10 days
The month with the most sunshine days is July (18.9 days).
The month with the least sunshine days is February (5.6 days).
Average UV index
Grantsdale, MT
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover
Grantsdale, MT
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility
Grantsdale, 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, March and December (4mi).
Grantsdale, Montana, USA
Weather forecast for your location
1. Click Locate me button
2. Allow the app to use your location
2. Allow the app to use your location