Little Bighorn Battlefield National Monument · Photo: 1025wil · CC BY-SA 3.0Less rain and snow falls on Crow Agency than on 92% of U.S. towns: 16 inches a year
Expect July afternoons of about 89°. Winter nights are cold: in January they are colder than in 92% of U.S. towns. Compared with 1901–2000, the average now sits 1.2° higher. The frost-free window for a garden runs roughly May 13 to September 29.
A year in Crow Agency at a glance
Each month’s typical high and low, and what it brings.
What stands out about Crow Agency’s climate
Compared with towns across the U.S., with Crow Agency’s place in Montana beside it.
What a year in Crow Agency feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 135 frost-free days a year
In half of years the last 32° night comes by May 13 and the first by September 29. Frost and day counts come from NOAA’s station at Hardin, MT, 11 miles from the town’s center, 180 ft lower.
The 2023 USDA map puts Crow Agency’s center in zone 4b: the coldest night of a typical winter, averaged over 1991–2020, reaches about −24°. 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 28 inches of snow a winter
Snow, measured at Hardin, MT, falls mostly in January, February and December. Precipitation (rain plus melted snow) adds up to 16 inches a year; May is the wettest month and January the driest. Rain or snow falls on about 70 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Crow Agency
92% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October 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 Hardin, MT.
Living with Crow Agency’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
135 frost-free days in zone 4b. The last frost comes by May 13 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Sep 29.
Months with highs of 62–84° and lows of 40° or more: May, June and September. 9.3 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Crow Agency from natural hazards, river flooding is the largest share (39%); heat waves, cold waves, winter storms and ice storms together are 23%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Crow Agency and similar climates
TownRatings has no climate map of the towns around Crow Agency yet.
Climates most like Crow Agency’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 |
|---|---|---|---|---|
| Crow Agency, MT | 11° | 89° | 16" | 28" |
| Torrington, WY | 14° | 90° | 13" | 31" |
| Sidney, NE | 15° | 89° | 17" | 29" |
| Fort Morgan, CO | 14° | 91° | 14" | 23" |
| Pierre, SD | 9° | 88° | 19" | 37" |
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 Crow Agency averaged 1.2° warmer than the 1900s. The biggest change is in January (+3.9°).
A smaller shift than in 65% 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 Crow Agency compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Crow Agency’s place among Montana’s.
Crow Agency weather by month
Highs, lows and precipitation from NOAA’s grid at Crow Agency’s center; snow, wet days and snow on the ground from Hardin, MT. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 36° | 11° | 0.7" | 6.0" | 5 | 13 | 13° – 36° |
| February | 40° | 14° | 0.8" | 6.2" | 5 | 8 | 8° – 38° |
| March | 51° | 23° | 0.8" | 3.4" | 6 | 4 | 25° – 46° |
| April | 60° | 32° | 2.0" | 1.3" | 7 | 1 | 40° – 50° |
| May | 69° | 41° | 2.6" | 0.0" | 9 | 0 | 50° – 60° |
| June | 79° | 50° | 2.3" | 0.0" | 8 | 0 | 59° – 69° |
| July | 89° | 56° | 1.1" | 0.0" | 5 | 0 | 63° – 79° |
| August | 88° | 53° | 1.0" | 0.0" | 4 | 0 | 65° – 77° |
| September | 77° | 44° | 1.5" | 0.0" | 5 | 0 | 55° – 67° |
| October | 62° | 32° | 1.5" | 1.6" | 7 | 1 | 40° – 53° |
| November | 47° | 21° | 0.8" | 3.1" | 5 | 3 | 22° – 44° |
| December | 36° | 13° | 0.7" | 6.3" | 4 | 10 | 13° – 34° |
| Year | 61° | 32° | 15.7" | 27.9" | 70 | 40 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 8° to 38°. May is the most reliable, staying within 10°.
Where Crow Agency’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 Crow Agency’s center.
- Snow: Hardin, MT.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Hardin, MT, 11 miles from the town’s center, 180 ft lower; 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 Crow Agency’s climate
What is the weather like in Crow Agency?
A typical July afternoon reaches 89°, a January night drops to 11°, and about 28 inches of snow falls in a normal winter. Colder January nights than 92% of U.S. towns; hotter July afternoons than 74% of U.S. towns.
How cold does it get in Crow Agency in winter?
January nights average 11°. About 166 nights a year reach 32° or below and 18 reach 0° or below. In the coldest January of the last 30 years the month averaged 13°.
How much snow does Crow Agency get?
About 28 inches in a normal winter at Hardin, MT, most of it in January, February and December, with snow on the ground about 40 days a year.
How hot does it get in Crow Agency?
July, with a typical high of 89° and a low of 56°. About 52 days a year reach 90° and 8 reach 100° (Hardin, MT).
When is the first and last frost in Crow Agency?
In half of years the last spring frost (32°) comes by May 13 and the first fall frost by September 29, about 135 frost-free days, at Hardin, MT.
What growing zone is Crow Agency in?
Zone 4b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −24°.
What is the best time of year to visit Crow Agency?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Crow Agency getting warmer?
Yes: 1991–2020 averaged 1.2° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 65% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Crow Agency.
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.