Lewiston, Maine Weather
Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Lewiston weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast——83°57°—
- MondayJul 6Overcast——78°59°-5°
- TuesdayJul 7Light Drizzle40%0.05″67°54°-11°
- WednesdayJul 8Overcast21%—85°52°+18°
- ThursdayJul 9Overcast17%—90°60°+5°
- FridayJul 10Overcast37%—83°61°-7°
- SaturdayJul 11Overcast13%—80°53°-3°
AQI 53 (Moderate), driven by PM2.5. AQI up 8 over the last 6 hours (gradual rise). PM2.5 at 10.0 µg/m³ (AQI 53) with a 0.95 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
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 43 now. With UV 7.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 40 around 1 PM.
- Present
- AQI 43
- UV peak
- 7.0 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 40
PM × Wind × Precip
PM2.5 at 10.0 µg/m³ (AQI 53) with a 0.95 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.95
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
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
- 11:00 PM
- Moonset
- 10:48 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Lewiston at a glance
- Today vs. normal: 12°F above the seasonal normal for this latitude
- Last frost: May 11 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 04240
16-Day Forecast — Lewiston
- Sun83°57°4%
- Mon78°59°1%
- Tue67°54°40%
- Wed85°52°21%
- Thu90°60°17%
- Fri83°61°37%
- Sat80°53°13%
- Sun77°56°17%
- Mon74°53°19%
- Tue84°55°23%
- Wed88°64°24%
- Thu79°56°21%
- Fri87°56°27%
- Sat88°62°19%
- Sun81°59°26%
- Mon85°60°39%
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.
ZIP codes in Lewiston
- 04240
- 04241
- 04243