Rochester, New Hampshire Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Rochester weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Light Drizzle15%—89°72°—
- SundayJul 5Overcast——84°65°-5°
- MondayJul 6Overcast34%—73°60°-11°
- TuesdayJul 7Overcast38%—72°54°-1°
- WednesdayJul 8Overcast——83°52°+11°
- ThursdayJul 9Overcast15%—93°59°+10°
- FridayJul 10Light Drizzle45%0.01″79°66°-14°
AQI 38 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 7.7 µg/m³, PM10 at 8.3 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 during the projected peak around 8 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 43. Overcast through the UV peak window (cloud cover ~64%) — afternoon ozone should stay flat.
- Present
- AQI 43
- UV peak
- 7.5 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 21
PM × Wind × Precip
PM2.5 at 7.7 µg/m³, PM10 at 8.3 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.93
- 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 10:43 PM
- Moonset
- 9:42 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Rochester at a glance
- Today vs. normal: 17°F above the seasonal normal for this latitude
- Last frost: May 6 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP codes: 03839, 03867, 03868
16-Day Forecast — Rochester
- Sat89°72°15%
- Sun84°65°1%
- Mon73°60°34%
- Tue72°54°38%
- Wed83°52°9%
- Thu93°59°15%
- Fri79°66°45%
- Sat80°61°18%
- Sun74°59°25%
- Mon72°61°23%
- Tue73°62°24%
- Wed83°64°35%
- Thu93°64°26%
- Fri94°69°29%
- Sat91°67°23%
- Sun85°59°26%
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 — Rochester
SPC includes Rochester in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWNONENo severe risk
- 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 Rochester
- 03839
- 03868
- 03867
- 03866