Clarks Green, Pennsylvania Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Clarks Green weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast37%—93°68°—
- SundayJul 5Drizzle88%0.03″87°66°-6°
- MondayJul 6Heavy Drizzle88%0.15″69°60°-18°
- TuesdayJul 7Foggy53%—76°57°+7°
- WednesdayJul 8Overcast16%—83°54°+7°
- ThursdayJul 9Light Drizzle40%—84°59°+1°
- FridayJul 10Light Drizzle44%—80°63°-4°
AQI 37 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 43 now. With UV 4.7 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 27 around 1 PM.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 7 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 43 now. With UV 4.7 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 27 around 1 PM.
- Present
- AQI 43
- UV peak
- 4.7 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 27
PM × Wind × Precip
PM2.5 at 4.8 µg/m³ (AQI 27) with a 0.94 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.94
- Wind
- light
- 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
- 10:58 PM
- Moonset
- 10:04 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Clarks Green at a glance
- Today vs. normal: 8°F above the seasonal normal for this latitude
- Last frost: April 25 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
16-Day Forecast — Clarks Green
- Sat93°68°37%
- Sun87°66°88%
- Mon69°60°88%
- Tue76°57°53%
- Wed83°54°16%
- Thu84°59°40%
- Fri80°63°44%
- Sat86°63°26%
- Sun66°61°33%
- Mon66°60°24%
- Tue78°59°27%
- Wed86°59°27%
- Thu90°65°27%
- Fri89°67°39%
- Sat81°65°40%
- Sun84°60°39%
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 — Clarks Green
SPC has placed Clarks Green in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
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.
Microseason · July 1–5
Cicadas claim the afternoon
Annual cicada buzz begins, peaking in the heat of the day.
Day 185 of 365 · Wedge 37 of 72
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | — | — |
| April | lettuce, peas, spinach, radishes | — |
| May | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | tomatoes, peppers, beans, squash | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | — | — |
| December | — | — |
A year in weather
Clarks Green peaks at about 74°F in July and bottoms near 28°F in January; September brings the heaviest rain (4.2 inches) and February the least (2.1 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 28° | 2.6″ | 6 |
| February | 30° | 2.1″ | 6 |
| March | 38° | 2.8″ | 7 |
| April | 50° | 3.3″ | 7 |
| May | 61° | 3.3″ | 8 |
| June | 69° | 3.8″ | 8 |
| July | 74° | 3.6″ | 7 |
| August | 72° | 3.9″ | 7 |
| September | 65° | 4.2″ | 6 |
| October | 53° | 3.7″ | 6 |
| November | 43° | 2.9″ | 6 |
| December | 33° | 2.8″ | 6 |
Frequently asked
- When does it freeze in Clarks Green?
- In Clarks Green, expect the last spring frost near mid-April; Clarks Green's first autumn frost comes around mid-November.
- What is the rainy season in Clarks Green?
- September is the wettest month in Clarks Green, about 4.2 inches on average; the year totals roughly 39 inches.
- What is the warmest month in Clarks Green?
- July is Clarks Green's warmest month, averaging about 74°F.
- What is the coldest month in Clarks Green?
- Clarks Green bottoms out in January, with a mean near 28°F.
- When can I start a vegetable garden in Clarks Green?
- Clarks Green's last frost (mid-April) cues hardy greens; in Clarks Green, hold heat-lovers two weeks past.
- How many rainy days does Clarks Green get?
- Expect roughly 80 wet days a year in Clarks Green.
- What hardiness zone is Clarks Green?
- Clarks Green's USDA zone comes from its January mean (28°F); enter the ZIP on the USDA lookup for the number.
- What is the 10-day forecast for Clarks Green?
- Clarks Green's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
- Will it rain this week in Clarks Green?
- See this week's day-by-day rain chances for Clarks Green in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Clarks Green?
- Current conditions for Clarks Green and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Clarks Green forecast updated?
- The Clarks Green forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Clarks Green?
- Today's sunrise and sunset times for Clarks Green are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
- How accurate is the weather forecast for Clarks Green?
- The next few days in Clarks Green's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Climate
Clarks Green, Pennsylvania occupies a warm-summer humid continental zone, with January means near 28°F and July around 74°F — a 46°F swing.
Rain and snow bring Clarks Green roughly 39 inches a year across approximately 80 measurable-precipitation days.
The 46°F gap between Clarks Green's summer and winter, at 41.5°N, shapes Clarks Green's frost calendar.
ZIP codes in Clarks Green
- 18411