Twin Hills Colony, Montana Weather
Thunder retreats as the monsoon dies. Day 93 of summer. Read this microseason across nine climate regions →
Twin Hills Colony weather forecast — hour by hour, 7-day outlook, NOAA radar
Conditions updated 8:27 AM MDT · Open-Meteo
- TodaySep 21Clear——77°47°—
- TuesdaySep 22Clear——80°52°+3°
- WednesdaySep 23Overcast——80°57°0°
- ThursdaySep 24Overcast——85°58°+5°
- FridaySep 25Light Drizzle17%—82°51°-3°
- SaturdaySep 26Overcast17%—59°45°-23°
- SundaySep 27Overcast13%—65°45°+6°
Air quality now AQI 20 · Good
AQI 20 (Good), driven by PM2.5. AQI projected to climb to 41 over the next 6 hours.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 8 PM.
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
September dries up ditches or breaks down bridges.
- Moonrise
- 5:26 PM
- Moonset
- 1:17 AM
- In sign
- ♑︎ Capricorn
Thunder retreats as the monsoon dies
Read this microseason across nine climate regions →
All 72 microseasons on the year wheel →
Twin Hills Colony at a glance
- Today vs. normal: Today averages 62°F (high 77°F, low 47°F), 6°F above the 56°F normal for Sep 21
- Last frost: May 13 (1991–2020 median, NOAA station 16 km away)
- Microseason: Sep 21–25
- Planting calendar: September — plant garlic (overwinter); harvest tomatoes, peppers, beans, summer squash, winter squash, fall brassicas, carrots
16-Day Forecast — Twin Hills Colony
- Mon77°47°0%
- Tue80°52°2%
- Wed80°57°4%
- Thu85°58°4%
- Fri82°51°17%
- Sat59°45°17%
- Sun65°45°13%
- Mon59°48°13%
- Tue61°43°3%
- Wed69°45°2%
- Thu67°51°9%
- Fri58°42°9%
- Sat53°40°6%
- Sun66°40°6%
- Mon77°49°0%
- Tue64°47°6%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Fall planting + final harvests
As of September 21, the season's first frost (typically September 29) is approaching. Pick what frost-tender plants still carry before the next cold front. This city's planting calendar for September: plant garlic (overwinter); harvest tomatoes, peppers, beans, summer squash, winter squash, fall brassicas, and carrots.
SPC Convective Outlook
Storm Prediction Center — Twin Hills Colony
SPC includes Twin Hills Colony in the general thunderstorm area tomorrow — no severe risk, but storms are possible.
- TODAYNONENo severe risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3NONENo severe risk
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook.
Sun & seasons in Twin Hills Colony
Twin Hills Colony sits in Chouteau County, where the year’s longest day runs 16h 3m of daylight and its shortest just 8h 22m — a swing of +7h 41m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.
Billings, the state’s largest city, lies about 194 miles to the SE. The nearest town Twin Hills Colony tracks is Sunnybrook Colony, roughly 19 miles to the ENE.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| April | lettuce, peas, spinach, radishes | — |
| May | lettuce, peas, spinach, radishes | spinach, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes |
| July | tomatoes, peppers, beans, squash, fall brassicas, carrots | lettuce, peas, spinach |
| August | garlic (overwinter) | lettuce, peas, beans, summer squash, garlic |
| September | garlic (overwinter) | tomatoes, peppers, beans, summer squash, winter squash, fall brassicas, carrots |
| October | — | fall brassicas, carrots |
A year in weather
Twin Hills Colony peaks at about 68°F in July and bottoms near 24°F in January; June brings the heaviest rain (2.7 inches) and February the least (0.4 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 24° | 0.4″ | 4 |
| February | 26° | 0.4″ | 4 |
| March | 33° | 0.5″ | 6 |
| April | 44° | 1.2″ | 8 |
| May | 52° | 2.0″ | 10 |
| June | 60° | 2.7″ | 11 |
| July | 68° | 1.2″ | 7 |
| August | 68° | 1.1″ | 6 |
| September | 59° | 1.1″ | 6 |
| October | 46° | 0.9″ | 6 |
| November | 36° | 0.5″ | 3 |
| December | 26° | 0.5″ | 5 |
Regional context
Similar climates Riverview Colony, MT, Carter, MT, Sunnybrook Colony, MT
Per NOAA NCEI 1991-2020 normals, Twin Hills Colony runs from a 24°F January mean to 68°F in July, a 45°F seasonal spread, with near 12.5 inches of precipitation across about 75 wet days.
Precipitation in Twin Hills Colony runs summer-dominant: June averages 2.7 inches across 10.7 days of warm-season storms, while February drops to 0.4 inches over 4.3 rainy days of drier cool air. That puts Twin Hills Colony in a summer-convective cohort with places like Riverview Colony, MT, Carter, MT and Sunnybrook Colony, MT.
Once Twin Hills Colony passes May 13, freezes fade and Twin Hills Colony's beds take kale, peas, spinach, and parsnips. Heat-demanding starts go out a fortnight on in Twin Hills Colony, after the soil warms and cold snaps clear. By September 29, frost is back in Twin Hills Colony — protect or harvest anything tender. Open lawns in Twin Hills Colony whiten first when frost returns.
Similar climates: Riverview Colony, MT, Carter, MT, Sunnybrook Colony, MT, Floweree, MT, Fort Benton, MT.
Frequently asked
- When does it freeze in Twin Hills Colony?
- In Twin Hills Colony, expect the last spring frost near May 13; Twin Hills Colony's first autumn frost comes around September 29.
- What is the rainy season in Twin Hills Colony?
- Twin Hills Colony sees its heaviest rain in June (around 2.7 inches), part of roughly 12 inches a year.
- What is the warmest month in Twin Hills Colony?
- On average July tops the year in Twin Hills Colony at about 68°F.
- What is the coldest month in Twin Hills Colony?
- The coldest stretch in Twin Hills Colony falls in January, around 24°F on average.
- When can I start a vegetable garden in Twin Hills Colony?
- Around May 13, start frost-hardy crops in Twin Hills Colony; tomatoes and basil belong a fortnight later.
- How many rainy days does Twin Hills Colony get?
- Twin Hills Colony averages about 75 days with measurable rain or snow each year.
- What hardiness zone is Twin Hills Colony?
- With January around 24°F, Twin Hills Colony's zone reflects that minimum — the USDA ZIP map confirms Twin Hills Colony's band.
- What is the 10-day forecast for Twin Hills Colony?
- Twin Hills Colony's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
- Will it rain this week in Twin Hills Colony?
- See this week's day-by-day rain chances for Twin Hills Colony in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Twin Hills Colony?
- Current conditions for Twin Hills Colony and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Twin Hills Colony forecast updated?
- The Twin Hills Colony forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Twin Hills Colony?
- Today's sunrise and sunset times for Twin Hills Colony are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
- How accurate is the weather forecast for Twin Hills Colony?
- The next few days in Twin Hills Colony's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Twin Hills Colony sits at 48.0°N; its climate zone is cold semi-arid (Köppen approximation).
ZIP codes in Twin Hills Colony
- 59420