Cheyenne, Wyoming Weather
Summer heat breaks with monsoon. Day 43 of summer. Read this microseason across nine climate regions →
Cheyenne weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayAug 2Overcast——98°59°—
- MondayAug 3Overcast13%—95°65°-3°
- TuesdayAug 4Clear——75°53°-20°
- WednesdayAug 5Drizzle——82°55°+7°
- ThursdayAug 6Drizzle——91°57°+9°
- FridayAug 7Clear——96°66°+5°
- SaturdayAug 8Overcast——96°70°0°
AQI 33 (Good), driven by Ozone. AQI down 7 over the last 6 hours (gradual decline). Ozone at AQI 37 now. With UV 4.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 21.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 9 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 37 now. With UV 4.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 21.
- Present
- AQI 37
- UV peak
- 4.3 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 21
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).
Red sky at night, sailor's delight.
- Moonrise
- 9:44 PM
- Moonset
- 10:07 AM
- In sign
- ♓︎ Pisces
Summer heat breaks with monsoon
Cheyenne at a glance
- Today vs. normal: 17°F above the seasonal normal for this latitude
- Last frost: April 23 (climatological average for this latitude)
- Microseason: Aug 1–5
- Planting window: Sow fall peas. Start kale and collard seedlings for fall.
ZIP codes: 82001, 82007, 82009
16-Day Forecast — Cheyenne
- Sun98°59°4%
- Mon95°65°13%
- Tue75°53°5%
- Wed82°55°7%
- Thu91°57°7%
- Fri96°66°2%
- Sat96°70°3%
- Sun93°65°12%
- Mon97°69°25%
- Tue95°67°34%
- Wed89°62°43%
- Thu89°62°37%
- Fri93°63°40%
- Sat88°54°44%
- Sun92°66°45%
- Mon95°63°44%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Cheyenne
Right now in the garden
Peak growing season
As of August 2, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Cheyenne
SPC includes Cheyenne in the general thunderstorm area tomorrow — no severe risk, but storms are possible.
- TODAYNONENo severe risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
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.
Sun & seasons in Cheyenne
Cheyenne sits in Laramie County, where the year’s longest day runs 15h 8m of daylight and its shortest just 9h 12m — a swing of +5h 56m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.
Air quality in Cheyenne’s county has trended dirtier since 2020; its cleanest year on record was 2020 (median AQI 39). See the full air-quality history for Cheyenne.
ZIP codes in Cheyenne
- 82009
- 82001
- 82007
- 82002
- 82003