Precipitation in Greycliff trails that of 93% of U.S. towns: 15 inches a year
Sunny July days climb to about 86°. In January, nights here are colder than in 77% of U.S. towns. Decade by decade the climate has edged up, 1.4° above 1901–2000. Garden planting can start around May 14; autumn frost returns near September 26.
A year in Greycliff at a glance
Each month’s typical high and low, and what it brings.
What stands out about Greycliff’s climate
Compared with towns across the U.S., with Greycliff’s place in Montana beside it.
What a year in Greycliff feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 133 frost-free days a year
In half of years the last 32° night comes by May 14 and the first by September 26. Frost and day counts come from NOAA’s station at Big Timber, MT, 10 miles from the town’s center, 160 ft higher.
The 2023 USDA map puts Greycliff’s center in zone 4b: the coldest night of a typical winter, averaged over 1991–2020, reaches about −20°. 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 55 inches of snow a winter
Snow, measured at Big Timber, MT, falls mostly in February and December. Precipitation (rain plus melted snow) adds up to 15 inches a year; May is the wettest month and January the driest. Rain or snow falls on about 82 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Greycliff
95% 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 Big Timber, MT.
Living with Greycliff’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
133 frost-free days in zone 4b. The last frost comes by May 14 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 26.
Months with highs of 62–84° and lows of 40° or more: June and September.
Parks & trails →Of the yearly building losses FEMA expects in Greycliff from natural hazards, river flooding is the largest share (58%); heat waves, cold waves, winter storms and ice storms together are 11%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Greycliff and similar climates
TownRatings has no climate map of the towns around Greycliff yet.
Climates most like Greycliff’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 |
|---|---|---|---|---|
| Greycliff, MT | 17° | 86° | 15" | 55" |
| The Pinery, CO | 17° | 86° | 17" | 58" |
| Doney Park, AZ | 17° | 86° | 16" | 52" |
| Pocatello, ID | 19° | 87° | 15" | 64" |
| Cheyenne, WY | 16° | 85° | 15" | 65" |
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 Greycliff averaged 1.4° warmer than the 1900s. The biggest change is in January (+4.1°).
A smaller shift than in 50% 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 Greycliff compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Greycliff’s place among Montana’s.
Greycliff weather by month
Highs, lows and precipitation from NOAA’s grid at Greycliff’s center; snow, wet days and snow on the ground from Big Timber, MT. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 39° | 17° | 0.5" | 7.1" | 5 | 18° – 36° |
| February | 41° | 17° | 0.5" | 10.8" | 4 | 11° – 40° |
| March | 50° | 24° | 0.9" | 9.1" | 6 | 26° – 45° |
| April | 57° | 31° | 1.8" | 3.6" | 9 | 38° – 48° |
| May | 67° | 39° | 2.7" | 0.6" | 11 | 48° – 57° |
| June | 76° | 47° | 2.3" | 0.0" | 11 | 57° – 67° |
| July | 86° | 53° | 1.3" | 0.0" | 8 | 60° – 76° |
| August | 85° | 51° | 0.9" | 0.0" | 5 | 63° – 72° |
| September | 75° | 42° | 1.2" | 0.5" | 6 | 55° – 64° |
| October | 60° | 33° | 1.4" | 4.8" | 7 | 38° – 52° |
| November | 47° | 24° | 0.6" | 7.9" | 5 | 27° – 46° |
| December | 38° | 17° | 0.6" | 10.2" | 4 | 18° – 35° |
| Year | 60° | 33° | 14.6" | 54.6" | 82 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 11° to 40°. May is the most reliable, staying within 9°.
Where Greycliff’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 Greycliff’s center.
- Snow: Big Timber, MT.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Big Timber, MT, 10 miles from the town’s center, 160 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 Greycliff’s climate
What is the weather like in Greycliff?
A typical July afternoon reaches 86°, a January night drops to 17°, and about 55 inches of snow falls in a normal winter. Colder January nights than 77% of U.S. towns; hotter July afternoons than 58% of U.S. towns.
How cold does it get in Greycliff in winter?
January nights average 17°. About 153 nights a year reach 32° or below and 14 reach 0° or below. In the coldest January of the last 30 years the month averaged 18°.
How much snow does Greycliff get?
About 55 inches in a normal winter at Big Timber, MT, most of it in February and December.
How hot does it get in Greycliff?
July, with a typical high of 86° and a low of 53°. About 27 days a year reach 90° (Big Timber, MT).
When is the first and last frost in Greycliff?
In half of years the last spring frost (32°) comes by May 14 and the first fall frost by September 26, about 133 frost-free days, at Big Timber, MT.
What growing zone is Greycliff in?
Zone 4b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −20°.
What is the best time of year to visit Greycliff?
By one simple rule (highs of 62–84° and lows of 40° or more), June and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Greycliff getting warmer?
Yes: 1991–2020 averaged 1.4° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 50% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Greycliff.
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.