Union, New Hampshire Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Union weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast——87°70°—
- SundayJul 5Overcast——82°64°-5°
- MondayJul 6Overcast30%—76°59°-6°
- TuesdayJul 7Overcast37%—72°53°-4°
- WednesdayJul 8Overcast——83°50°+11°
- ThursdayJul 9Overcast16%—92°58°+9°
- FridayJul 10Light Drizzle40%0.01″77°65°-15°
AQI 35 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 8.1 µg/m³, PM10 at 8.8 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
Ozone × UV × Sky
Ozone at AQI 41 now. With UV 7.2 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 39 around 1 PM.
- Present
- AQI 41
- UV peak
- 7.2 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 39
PM × Wind × Precip
PM2.5 at 8.1 µg/m³, PM10 at 8.8 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.92
- 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
Union at a glance
- Today vs. normal: 15°F above the seasonal normal for this latitude
- Last frost: May 7 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 03887
16-Day Forecast — Union
- Sat87°70°9%
- Sun82°64°1%
- Mon76°59°30%
- Tue72°53°37%
- Wed83°50°9%
- Thu92°58°16%
- Fri77°65°40%
- Sat81°61°17%
- Sun74°58°25%
- Mon70°58°23%
- Tue71°57°25%
- Wed85°63°35%
- Thu92°63°26%
- Fri92°68°29%
- Sat90°65°23%
- Sun83°55°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 — Union
SPC includes Union in the general thunderstorm area day after tomorrow — no severe risk, but storms are possible.
- TODAYNONENo severe risk
- 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 Union
- 03887