Williamsburg, Colorado Weather
Monsoon storms drench the south. Day 15 of summer. Read this microseason across nine climate regions →
Williamsburg weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast——94°64°—
- MondayJul 6Overcast——95°65°+1°
- TuesdayJul 7Light Rain64%0.13″99°65°+4°
- WednesdayJul 8Light Drizzle49%—99°62°0°
- ThursdayJul 9Overcast43%—97°62°-2°
- FridayJul 10Light Drizzle24%0.01″96°61°-1°
- SaturdayJul 11Clear——98°64°+2°
AQI 146 (Unhealthy for Sensitive Groups), driven by PM2.5. AQI down 23 over the last 6 hours — air quality is improving sharply. PM2.5 at 108.3 µg/m³, PM10 at 113.9 µg/m³ — typical background levels with no transport signature.
CAUTION Sensitive groups (children, elderly, respiratory conditions) should limit prolonged outdoor exertion, especially during the projected peak around 12 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 38 now. With UV 3.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 17 around 1 PM.
- Present
- AQI 38
- UV peak
- 3.3 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 17
PM × Wind × Precip
PM2.5 at 108.3 µg/m³, PM10 at 113.9 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.95
- 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
- 11:18 PM
- Moonset
- 11:16 AM
- In sign
- ♓︎ Pisces
Monsoon storms drench the south
Williamsburg at a glance
- Today vs. normal: 7°F below the seasonal normal for this latitude
- Last frost: April 6 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
15-Day Forecast — Williamsburg
- Sun94°64°9%
- Mon95°65°6%
- Tue99°65°64%
- Wed99°62°49%
- Thu97°62°43%
- Fri96°61°24%
- Sat98°64°8%
- Sun94°64°3%
- Mon102°65°6%
- Tue104°70°17%
- Wed103°67°30%
- Thu100°68°42%
- Fri95°65°42%
- Sat96°66°48%
- Sun98°68°54%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 5, 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 — Williamsburg
SPC includes Williamsburg in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- 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.
ZIP codes in Williamsburg
- 81226
- 81212