Jamestown, Colorado Weather
Monsoon storms drench the south. Day 14 of summer. Read this microseason across nine climate regions →
Jamestown weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast——80°58°—
- SundayJul 5Overcast——84°59°+4°
- MondayJul 6Overcast15%—89°59°+5°
- TuesdayJul 7Light Drizzle73%—87°60°-2°
- WednesdayJul 8Light Drizzle62%—83°55°-4°
- ThursdayJul 9Overcast45%—91°56°+8°
- FridayJul 10Clear17%—95°63°+4°
AQI 50 (Good), driven by PM2.5. AQI down 67 over the last 6 hours — air quality is improving sharply. PM2.5 at 10.1 µg/m³, PM10 at 10.8 µg/m³ — typical background levels with no transport signature.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM2.5 at 10.1 µg/m³, PM10 at 10.8 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.94
- Wind
- light
- 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 10:57 PM
- Moonset
- 10:10 AM
- In sign
- ♓︎ Pisces
Monsoon storms drench the south
Jamestown at a glance
- Today vs. normal: 14°F below the seasonal normal for this latitude
- Last frost: April 17 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 80455
15-Day Forecast — Jamestown
- Sat80°58°9%
- Sun84°59°9%
- Mon89°59°15%
- Tue87°60°73%
- Wed83°55°62%
- Thu91°56°45%
- Fri95°63°17%
- Sat93°59°10%
- Sun101°65°9%
- Mon89°62°21%
- Tue95°60°36%
- Wed95°62°35%
- Thu95°65°36%
- Fri81°61°46%
- Sat85°59°45%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 4, 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 — Jamestown
SPC has placed Jamestown in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Isolated severe storms possible. Limited threat for hail or damaging wind.
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 Jamestown
- 80455