Grant is among the driest of U.S. towns: 10 inches of precipitation a year
In January the night’s low is typically 11°. Winter nights are cold: in January they are colder than in 92% of U.S. towns. Decade by decade the climate has edged up, 1.8° above 1901–2000. Central heating does most of its work from October to May, in months below 50° on average.
A year in Grant at a glance
Each month’s typical high and low, and what it brings.
What stands out about Grant’s climate
Compared with towns across the U.S., with Grant’s place in Montana beside it.
What a year in Grant feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
A freeze is possible in every month
About 230 nights a year fall to 32° or below, and 32 to 0° or below. Frost and day counts come from NOAA’s station at Dillon 18 Wsw, MT, 11 miles from the town’s center, 170 ft higher.
The 2023 USDA map puts Grant’s center in zone 4b: the coldest night of a typical winter, averaged over 1991–2020, reaches about −22°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 42 inches of snow a winter
Snow, measured at Grant 5 Se, MT, falls mostly in April. Precipitation (rain plus melted snow) adds up to 10 inches a year; June is the wettest month and January the driest. Rain or snow falls on about 91 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Grant
Nearly all of the work is heating: a normal year has almost no cooling days. Months averaging under 55° run from September through May.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Dillon 18 Wsw, MT.
Living with Grant’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
Zone 4b, and frost can come in any month. The longest frost-free stretch in half of years is about 72 days.
Months with highs of 62–84° and lows of 40° or more: June, July and August.
Parks & trails →Of the yearly building losses FEMA expects in Grant from natural hazards, avalanches are the largest share (41%); heat waves, cold waves, winter storms and ice storms together are 7%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Grant and similar climates
TownRatings has no climate map of the towns around Grant yet.
Climates most like Grant’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Grant, MT | 11° | 82° | 10" | 42" |
| Laramie, WY | 12° | 81° | 12" | 64" |
| Taos, NM | 11° | 84° | 13" | 28" |
| Salida, CO | 10° | 85° | 8" | 37" |
| Dickinson, ND | 5° | 83° | 16" | 35" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
Warmer than it used to be
The last 30 years in Grant averaged 1.8° warmer than the 1900s. The biggest change is in January (+3.9°).
A bigger shift than in 78% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Grant compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Grant’s place among Montana’s.
Grant weather by month
Highs, lows and precipitation from NOAA’s grid at Grant’s center; snow, wet days and snow on the ground from Grant 5 Se, MT. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 31° | 11° | 0.3" | 4.8" | 5 | 26 | 14° – 28° |
| February | 34° | 12° | 0.3" | 5.0" | 6 | 21 | 14° – 31° |
| March | 43° | 21° | 0.5" | 6.4" | 8 | 11 | 26° – 39° |
| April | 51° | 26° | 0.9" | 8.5" | 10 | 5 | 33° – 44° |
| May | 62° | 34° | 1.5" | 2.3" | 11 | 1 | 41° – 53° |
| June | 70° | 41° | 1.8" | 0.4" | 10 | 0 | 50° – 63° |
| July | 82° | 47° | 0.9" | 0.0" | 7 | 0 | 53° – 70° |
| August | 80° | 44° | 0.8" | 0.0" | 7 | 0 | 55° – 66° |
| September | 70° | 38° | 0.9" | 0.7" | 6 | 0 | 50° – 58° |
| October | 55° | 28° | 0.8" | 3.5" | 8 | 3 | 33° – 49° |
| November | 40° | 18° | 0.5" | 4.4" | 6 | 12 | 20° – 37° |
| December | 30° | 10° | 0.4" | 5.5" | 7 | 25 | 13° – 24° |
| Year | 54° | 28° | 9.6" | 41.5" | 91 | 103 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 14° to 31°. September is the most reliable, staying within 8°.
Where Grant’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Grant’s center.
- Snow: Grant 5 Se, MT.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Dillon 18 Wsw, MT, 11 miles from the town’s center, 170 ft higher; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Grant’s climate
What is the weather like in Grant?
A typical July afternoon reaches 82°, a January night drops to 11°, and about 42 inches of snow falls in a normal winter. Colder January nights than 92% of U.S. towns; cooler July afternoons than 84% of U.S. towns.
How cold does it get in Grant in winter?
December nights average 10°. About 230 nights a year reach 32° or below and 32 reach 0° or below. In the coldest December of the last 30 years the month averaged 13°.
How much snow does Grant get?
About 42 inches in a normal winter at Grant 5 Se, MT, most of it in April, with snow on the ground about 103 days a year.
How hot does it get in Grant?
July, with a typical high of 82° and a low of 47°. About 4 days a year reach 90° (Dillon 18 Wsw, MT).
When is the first and last frost in Grant?
There is no reliable frost-free season: at Dillon 18 Wsw, MT, every month has nights at 32° or below, about 230 a year. In half of years the longest stretch without a freeze is about 72 days.
What growing zone is Grant in?
Zone 4b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −22°.
What is the best time of year to visit Grant?
By one simple rule (highs of 62–84° and lows of 40° or more), June, July and August. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Grant getting warmer?
Yes: 1991–2020 averaged 1.8° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 78% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Grant.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.