Merrimac, Virginia Weather
Heat settles and the rain begins. Day 89 of spring. Read this microseason across nine climate regions →
Merrimac weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 16Overcast11%—77°51°—
- WednesdayJun 17Overcast——85°58°+8°
- ThursdayJun 18T-storm w/ Hail50%—86°66°+1°
- FridayJun 19Light Drizzle56%0.03″73°58°-13°
- SaturdayJun 20Overcast——77°54°+4°
- SundayJun 21Light Rain19%0.18″80°48°+3°
- MondayJun 22Drizzle63%0.08″76°55°-4°
AQI 42 (Good), driven by PM2.5. AQI up 9 over the last 6 hours (gradual rise). PM2.5 at 9.7 µg/m³, PM10 at 11.9 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
Ozone × UV × Sky
Ozone at AQI 46. Overcast through the UV peak window (cloud cover ~70%) — afternoon ozone should stay flat.
- Present
- AQI 46
- UV peak
- 4.0 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 12
PM × Wind × Precip
PM2.5 at 9.7 µg/m³, PM10 at 11.9 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.82
- 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).
Cut your thistles before St. John, you will have two instead of one.
- Moonrise
- 7:14 AM
- Moonset
- 9:57 PM
- In sign
- ♋︎ Cancer
Heat settles and the rain begins
Merrimac at a glance
- Today vs. normal: 4°F below the seasonal normal for this latitude
- Last frost: March 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 — Merrimac
- Tue77°51°11%
- Wed85°58°3%
- Thu86°66°50%
- Fri73°58°56%
- Sat77°54°2%
- Sun80°48°19%
- Mon76°55°63%
- Tue82°49°44%
- Wed86°56°28%
- Thu84°59°24%
- Fri88°60°34%
- Sat93°63°42%
- Sun87°64°40%
- Mon93°66°45%
- Tue93°68°43%
- Wed91°67°48%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of June 16, 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 — Merrimac
SPC has placed Merrimac in the Slight Risk category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWNONENo severe risk
- DAY 3SLGTSlight Risk
Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.
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 Merrimac
- 24060