Merrimac, Wisconsin Weather
Queen Anne's lace lines the roads. Day 16 of summer. Read this microseason across nine climate regions →
Merrimac weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast——82°65°—
- MondayJul 6Mostly Clear——84°64°+2°
- TuesdayJul 7Overcast——82°63°-2°
- WednesdayJul 8Thunderstorm27%—82°67°0°
- ThursdayJul 9Thunderstorm53%—80°68°-2°
- FridayJul 10Overcast15%—79°63°-1°
- SaturdayJul 11Overcast——82°62°+3°
AQI 36 (Good), driven by Ozone. AQI up 8 over the last 6 hours (gradual rise). Ozone at AQI 30 now. With UV 0.1 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 7.
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 30 now. With UV 0.1 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 7.
- Present
- AQI 30
- UV peak
- 0.1 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 7
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).
When the stars begin to huddle, the earth will soon become a puddle.
- Moonrise
- 11:39 PM
- Moonset
- 12:20 PM
- In sign
- ♓︎ Pisces
Queen Anne's lace lines the roads
Merrimac at a glance
- Today vs. normal: 5°F above the seasonal normal for this latitude
- Last frost: May 6 (climatological average for this latitude)
- Microseason: Jul 6–10
- Planting window: Sow fall broccoli and cabbage indoors for transplant in 4 weeks.
ZIP code: 53561
16-Day Forecast — Merrimac
- Sun82°65°3%
- Mon84°64°3%
- Tue82°63°1%
- Wed82°67°27%
- Thu80°68°53%
- Fri79°63°15%
- Sat82°62°8%
- Sun85°65°8%
- Mon90°67°9%
- Tue80°63°12%
- Wed80°59°14%
- Thu75°63°22%
- Fri65°63°29%
- Sat75°62°23%
- Sun77°61°18%
- Mon80°63°26%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 6, 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 includes Merrimac in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWNONENo severe risk
- 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 Merrimac
- 53561