Geyser, Montana Weather
Thunderheads build by noon. Day 90 of spring. Read this microseason across nine climate regions →
Geyser weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 17Light Rain56%0.12″64°47°—
- ThursdayJun 18Light Drizzle22%0.01″65°48°+1°
- FridayJun 19Overcast——69°43°+4°
- SaturdayJun 20Light Drizzle15%—78°49°+9°
- SundayJun 21Light Drizzle15%—59°45°-19°
- MondayJun 22Overcast11%—69°41°+10°
- TuesdayJun 23Mostly Clear——80°49°+11°
AQI 39 (Good), driven by Ozone. AQI up 6 over the last 6 hours (gradual rise). Ozone at AQI 42 — peak already passed at 1 PM under partly cloudy skies. Levels should ease through evening.
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 42 — peak already passed at 1 PM under partly cloudy skies. Levels should ease through evening.
- Present
- AQI 42
- UV peak
- 2.5 at earlier today
- Sky at peak
- partly cloudy
- Projected peak
- AQI 42
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
- 7:58 AM
- Moonset
- 11:31 PM
- In sign
- ♌︎ Leo
Thunderheads build by noon
Geyser at a glance
- Today vs. normal: 11°F below the seasonal normal for this latitude
- Last frost: May 30 (climatological average for this latitude)
- Microseason: Jun 16–20
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
16-Day Forecast — Geyser
- Wed64°47°56%
- Thu65°48°22%
- Fri69°43°1%
- Sat78°49°15%
- Sun59°45°15%
- Mon69°41°11%
- Tue80°49°7%
- Wed79°58°24%
- Thu76°53°25%
- Fri78°56°23%
- Sat83°57°18%
- Sun80°57°30%
- Mon81°55°29%
- Tue75°57°27%
- Wed87°59°26%
- Thu86°58°23%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Warm-season window is open
As of June 17, 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.
SPC Convective Outlook
Storm Prediction Center — Geyser
SPC has placed Geyser in the General Thunderstorms category for severe thunderstorms today.
- TODAYTSTMGeneral Thunderstorms
- 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. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
ZIP codes in Geyser
- 59447