Precipitation in Twin Hills Colony trails that of 95% of U.S. towns: 13 inches a year
Nights in January average 10°. Seasons differ by 75°, from the coldest nights to the warmest afternoons. In January, nights here are colder than in 94% of U.S. towns. Radiators earn their keep from October to April, the months that average under 50°.
A year in Twin Hills Colony at a glance
Each month’s typical high and low, and what it brings.
What stands out about Twin Hills Colony’s climate
Compared with towns across the U.S., with Twin Hills Colony’s place in Montana beside it.
What a year in Twin Hills Colony feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 137 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 Brady 27 Ene (the Knees), MT, 10 miles from the town’s center, at about the same height.
The 2023 USDA map puts Twin Hills Colony’s center in zone 4a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −26°. 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 43 inches of snow a winter
Snow, measured at Brady 27 Ene (the Knees), MT, falls mostly in January and March. Precipitation (rain plus melted snow) adds up to 13 inches a year; June is the wettest month and February the driest. Rain or snow falls on about 75 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Twin Hills Colony
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 Brady 27 Ene (the Knees), MT.
Living with Twin Hills Colony’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
137 frost-free days in zone 4a. 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: June, August and September.
Parks & trails →Of the yearly building losses FEMA expects in Twin Hills Colony from natural hazards, river flooding is the largest share (63%); heat waves, cold waves, winter storms and ice storms together are 24%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Twin Hills Colony and similar climates
TownRatings has no climate map of the towns around Twin Hills Colony yet.
Climates most like Twin Hills Colony’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 |
|---|---|---|---|---|
| Twin Hills Colony, MT | 10° | 84° | 13" | 43" |
| Taos, NM | 11° | 84° | 13" | 28" |
| Gypsum, CO | 11° | 86° | 14" | 39" |
| Cody, WY | 14° | 85° | 11" | 45" |
| 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 Twin Hills Colony averaged 1.4° warmer than the 1900s. The biggest change is in January (+4.5°).
A bigger shift than in 52% 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 Twin Hills Colony compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Twin Hills Colony’s place among Montana’s.
Twin Hills Colony weather by month
Highs, lows and precipitation from NOAA’s grid at Twin Hills Colony’s center; snow, wet days and snow on the ground from Brady 27 Ene (the Knees), MT. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 32° | 10° | 0.5" | 7.5" | 4 | 8° – 35° |
| February | 36° | 12° | 0.4" | 6.1" | 4 | −3° – 38° |
| March | 46° | 20° | 0.5" | 7.4" | 6 | 16° – 41° |
| April | 56° | 29° | 1.3" | 5.6" | 8 | 37° – 47° |
| May | 66° | 39° | 2.1" | 1.5" | 10 | 48° – 58° |
| June | 74° | 46° | 2.8" | 0.0" | 11 | 57° – 65° |
| July | 84° | 52° | 1.1" | 0.0" | 7 | 59° – 76° |
| August | 83° | 50° | 1.2" | 0.0" | 6 | 61° – 71° |
| September | 72° | 42° | 1.1" | 0.1" | 6 | 53° – 63° |
| October | 57° | 30° | 0.9" | 2.0" | 6 | 34° – 50° |
| November | 43° | 20° | 0.6" | 6.1" | 3 | 20° – 40° |
| December | 34° | 13° | 0.5" | 6.2" | 5 | 10° – 35° |
| Year | 57° | 30° | 12.8" | 42.5" | 75 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from -3° to 38°. June is the most reliable, staying within 8°.
Where Twin Hills Colony’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 Twin Hills Colony’s center.
- Snow: Brady 27 Ene (the Knees), MT.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Brady 27 Ene (the Knees), MT, 10 miles from the town’s center, at about the same height; 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 Twin Hills Colony’s climate
What is the weather like in Twin Hills Colony?
A typical July afternoon reaches 84°, a January night drops to 10°, and about 43 inches of snow falls in a normal winter. Colder January nights than 94% of U.S. towns; cooler July afternoons than 58% of U.S. towns.
How cold does it get in Twin Hills Colony in winter?
January nights average 10°. About 152 nights a year reach 32° or below and 20 reach 0° or below. In the coldest January of the last 30 years the month averaged 8°.
How much snow does Twin Hills Colony get?
About 43 inches in a normal winter at Brady 27 Ene (the Knees), MT, most of it in January and March.
How hot does it get in Twin Hills Colony?
July, with a typical high of 84° and a low of 52°. About 22 days a year reach 90° (Brady 27 Ene (the Knees), MT).
When is the first and last frost in Twin Hills Colony?
In half of years the last spring frost (32°) comes by May 13 and the first fall frost by September 29, about 137 frost-free days, at Brady 27 Ene (the Knees), MT.
What growing zone is Twin Hills Colony in?
Zone 4a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −26°.
What is the best time of year to visit Twin Hills Colony?
By one simple rule (highs of 62–84° and lows of 40° or more), June, August and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Twin Hills Colony getting warmer?
Yes: 1991–2020 averaged 1.4° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 52% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Twin Hills Colony.
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.