Red Hill, Pennsylvania Weather
Fireflies rise from the lawn. Day 77 of spring. Read this microseason across nine climate regions →
Red Hill weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Mostly Clear——87°52°—
- FridayJun 5Overcast——92°62°+5°
- SaturdayJun 6Light Showers48%0.01″88°66°-4°
- SundayJun 7Drizzle48%0.01″84°62°-4°
- MondayJun 8Mostly Clear——77°55°-7°
- TuesdayJun 9Overcast——82°52°+5°
- WednesdayJun 10Mostly Clear——85°58°+3°
Ozone at AQI 73 — peak already passed at 1 PM under clear skies. AQI up 43 in the last 6 hours — air quality is degrading. Levels should ease through evening.
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 73 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 73
- UV peak
- 0.9 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 73
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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 3:31 AM
- Moonset
- 1:01 PM
- In sign
- ♒︎ Aquarius
Fireflies rise from the lawn
Red Hill at a glance
- Today vs. normal: 12°F above the seasonal normal for this latitude
- Last frost: April 18 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 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 — Red Hill
SPC has placed Red Hill in the Marginal Risk category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWNONENo severe risk
- DAY 3MRGLMarginal Risk
Isolated severe storms possible. Limited threat for hail or damaging wind.
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.
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
Red Hill's warmest month is July (~76°F mean) and its coldest is January (~30°F). Rainfall peaks in July (5.3 inches) and bottoms out in February (2.8 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 30° | 3.3″ | 6 |
| February | 32° | 2.8″ | 6 |
| March | 41° | 3.6″ | 7 |
| April | 52° | 3.7″ | 7 |
| May | 62° | 3.6″ | 8 |
| June | 71° | 4.4″ | 7 |
| July | 76° | 5.3″ | 8 |
| August | 74° | 4.6″ | 7 |
| September | 66° | 4.8″ | 7 |
| October | 55° | 4.1″ | 6 |
| November | 44° | 3.2″ | 6 |
| December | 35° | 3.9″ | 7 |
Regional context
Red Hill sits within a warm-summer humid continental climate region — a cohort that shares similar temperature ranges, seasonal patterns, and growing conditions across nearby cities.
Similar climates: Philadelphia, PA, Pittsburgh, PA, Allentown, PA, Harrisburg, PA, Lancaster, PA.
Frequently asked
- When does it freeze in Red Hill?
- Red Hill's last spring frost typically falls around mid-April, and the first fall frost arrives around mid-November.
- What is the rainy season in Red Hill?
- July is the wettest month with about 5.3 inches of rain on average; the city receives roughly 47 inches annually.
- What is the warmest month in Red Hill?
- July is typically warmest, averaging about 76°F.
- What is the coldest month in Red Hill?
- January is typically coldest, averaging about 30°F.
- When can I start a vegetable garden in Red Hill?
- Cool-season crops (peas, lettuce) can be sown around the last spring frost (mid-April); warm-season crops (tomatoes, peppers) wait until 1–2 weeks after.
- How many rainy days does Red Hill get?
- Red Hill averages about 82 rainy days per year.
- What hardiness zone is Red Hill?
- Red Hill's USDA hardiness zone is determined by its lowest average winter temperature; check the USDA's online lookup with the city ZIP for the current zone designation.
Climate
Red Hill, Pennsylvania sits in a warm-summer humid continental climate zone. January means hover near 30°F while July averages 76°F — a 45°F seasonal swing.
Across the year, Red Hill receives about 47 inches of precipitation spread over roughly 82 rainy days.
The rhythm of the year is set by latitude (40.4°N), proximity to large water bodies, and elevation — all of which shape what grows here, when frost is likely, and what the weather story looks like day to day.