Evergreen, Montana Weather
Pikas hayfeeding in granite peaks. Day 77 of spring. Read this microseason across nine climate regions →
Evergreen weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast24%—71°52°—
- FridayJun 5Overcast——72°47°+1°
- SaturdayJun 6Overcast——58°44°-14°
- SundayJun 7Light Drizzle29%—56°37°-2°
- MondayJun 8Overcast——66°37°+10°
- TuesdayJun 9Overcast44%—67°49°+1°
- WednesdayJun 10Overcast52%—73°47°+6°
Ozone at AQI 43 now. AQI flat over the last 6 hours (within ±3 points). With UV 5.7 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 23 by mid-afternoon.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 43 now. With UV 5.7 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 23 by mid-afternoon.
- Present
- AQI 43
- UV peak
- 5.7 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 23
PM × Wind × Precip
PM2.5 at 5.5 µg/m³, PM10 at 6.8 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.81
- Wind
- breezy
- Recent rain
- 0h in last 6h
- Pattern
- background
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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 6:40 AM
- Moonset
- 3:13 PM
- In sign
- ♒︎ Aquarius
Pikas hayfeeding in granite peaks
Evergreen at a glance
- Today vs. normal: 66°F — typical for the season
- Last frost: June 4 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Warm-season window is open
As of June 4, the last spring frost has passed for most years. Transplant tomatoes, peppers, eggplants, basil, and cucurbits (cucumbers, squash, melons) now. Direct-sow beans and corn into warm soil.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | — | — |
| April | — | — |
| May | lettuce, peas, spinach, radishes | lettuce, peas, radishes |
| June | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | tomatoes, peppers, beans, squash | tomatoes, beans, summer squash |
| August | tomatoes, peppers, beans, squash, fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| September | fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| October | — | winter squash, tomatoes (last) |
| November | — | — |
| December | — | — |
A year in weather
Evergreen's warmest month is July (~65°F mean) and its coldest is January (~24°F). Rainfall peaks in June (2.8 inches) and bottoms out in August (0.8 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 24° | 1.4″ | 5 |
| February | 27° | 1.0″ | 4 |
| March | 35° | 1.1″ | 4 |
| April | 43° | 1.3″ | 5 |
| May | 52° | 1.8″ | 6 |
| June | 58° | 2.8″ | 7 |
| July | 65° | 1.1″ | 3 |
| August | 64° | 0.8″ | 2 |
| September | 54° | 1.2″ | 4 |
| October | 42° | 1.4″ | 5 |
| November | 31° | 1.4″ | 5 |
| December | 24° | 1.5″ | 5 |
Regional context
Evergreen's climate, per the NOAA NCEI 1991-2020 normals from the nearest reporting station, runs cold-winter and warm-summer. January means hover near 24°F while July climbs to 65°F — a 41°F seasonal swing typical of northern-tier latitudes. Annual precipitation totals about 16.8 inches spread across roughly 53 days with measurable rain or snow.
Rainfall stays relatively even across the calendar: June tops out at 2.8 inches across 7.2 days with measurable rain, and August settles around 0.8 inches across 2.3 rainy days — a comparatively narrow seasonal range. The temperate, evenly-distributed pattern groups Evergreen with places like Kalispell, MT, Helena Flats, MT and Batavia, MT, where seasonal storm tracks deliver moisture more uniformly than the continental interior.
The frost-sensitive growing window opens around late-May, when overnight lows reliably clear freezing for cool-season crops like kale, peas, spinach, and parsnips. Warm-season transplants — tomatoes, peppers, and basil — typically wait two weeks past that date to avoid late spring cold snaps. The window closes around early-October, when overnight lows resume dipping below freezing and frost-tender plants need protection or harvest. These dates represent 30-year central tendencies; actual year-to-year variation can shift either bookend by 7-14 days, and local microclimate features within Evergreen — cold-air drainage on calm clear nights, slope aspect, distance from any nearby lake or river — can push the practical frost window earlier or later than the regional average.
Similar climates: Kalispell, MT, Helena Flats, MT, Batavia, MT, Forest Hill Village, MT, Rhodes, MT.
Frequently asked
- When does it freeze in Evergreen?
- Evergreen's last spring frost typically falls around mid-May, and the first fall frost arrives around mid-October.
- What is the rainy season in Evergreen?
- June is the wettest month with about 2.8 inches of rain on average; the city receives roughly 17 inches annually.
- What is the warmest month in Evergreen?
- July is typically warmest, averaging about 65°F.
- What is the coldest month in Evergreen?
- January is typically coldest, averaging about 24°F.
- When can I start a vegetable garden in Evergreen?
- Cool-season crops (peas, lettuce) can be sown around the last spring frost (mid-May); warm-season crops (tomatoes, peppers) wait until 1–2 weeks after.
- How many rainy days does Evergreen get?
- Evergreen averages about 53 rainy days per year.
- What hardiness zone is Evergreen?
- Evergreen's USDA hardiness zone is determined by its lowest average winter temperature; check the USDA's online lookup with the city ZIP for the current zone designation.
Climate
Evergreen, Montana sits in a cold semi-arid climate zone. January means hover near 24°F while July averages 65°F — a 41°F seasonal swing.
Across the year, Evergreen receives about 17 inches of precipitation spread over roughly 53 rainy days.
The rhythm of the year is set by latitude (48.2°N), proximity to large water bodies, and elevation — all of which shape what grows here, when frost is likely, and what the weather story looks like day to day.