Millerstown, Pennsylvania Weather
Fireflies rise from the lawn. Day 78 of spring. Read this microseason across nine climate regions →
Millerstown weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Mostly Clear——86°52°—
- FridayJun 5Overcast——89°60°+3°
- SaturdayJun 6Light Drizzle59%—87°65°-2°
- SundayJun 7Light Drizzle59%—85°63°-2°
- MondayJun 8Mostly Clear——77°55°-8°
- TuesdayJun 9Overcast——81°50°+4°
- WednesdayJun 10Partly Cloudy23%—84°57°+3°
AQI 79 (Moderate), driven by Ozone. AQI up 18 in the last 6 hours — air quality is degrading. Ozone at AQI 49. Overcast through the UV peak window (cloud cover ~92%) — afternoon ozone should stay flat.
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 49. Overcast through the UV peak window (cloud cover ~92%) — afternoon ozone should stay flat.
- Present
- AQI 49
- UV peak
- 0.0 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 6
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).
The higher the clouds, the finer the weather.
- Moonrise
- 4:09 AM
- Moonset
- 2:12 PM
- In sign
- ♒︎ Aquarius
Fireflies rise from the lawn
Millerstown at a glance
- Today vs. normal: 6°F below the seasonal normal for this latitude
- Last frost: April 19 (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 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.
SPC Convective Outlook
Storm Prediction Center — Millerstown
SPC has placed Millerstown 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
Millerstown's warmest month is July (~74°F mean) and its coldest is January (~29°F). Rainfall peaks in September (4.4 inches) and bottoms out in February (2.3 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 29° | 2.9″ | 6 |
| February | 31° | 2.3″ | 6 |
| March | 39° | 3.6″ | 7 |
| April | 51° | 3.5″ | 8 |
| May | 61° | 4.2″ | 9 |
| June | 70° | 4.0″ | 8 |
| July | 74° | 3.6″ | 7 |
| August | 72° | 3.6″ | 7 |
| September | 65° | 4.4″ | 6 |
| October | 54° | 3.8″ | 7 |
| November | 43° | 3.1″ | 6 |
| December | 34° | 3.3″ | 7 |
Regional context
Millerstown's baseline climate, derived from NOAA NCEI 1991-2020 normals at the nearest reporting station, swings from a January mean of 29°F to a July mean of 74°F — a 45°F seasonal arc typical of the mid-latitude bands. Annual precipitation runs about 42.1 inches spread across roughly 83 days with measurable rain or snow each year.
Rainfall stays relatively even across the calendar: September tops out at 4.4 inches across 6.1 days with measurable rain, and February settles around 2.3 inches across 5.5 rainy days — a comparatively narrow seasonal range. The balanced distribution lines Millerstown up with places like Thompsontown, PA, East Salem, PA and McAlisterville, PA, all of which run on overlapping storm tracks rather than a single seasonal moisture source.
The frost-sensitive growing window opens around mid-April, when overnight lows reliably clear freezing for cool-season crops like kale, peas, spinach, and parsnips. Warm-soil crops — tomatoes, peppers, eggplant — wait until soil temperatures reach the mid-50s°F, usually two weeks past the last-frost date. The window closes around mid-November, when overnight lows resume dipping below freezing and frost-tender plants need protection or harvest. These are 30-year central tendencies; year-to-year frost dates can move by up to two weeks. Local features matter: a south-facing slope inside Millerstown typically runs 3-5 days ahead of the regional last-frost date, while a low-lying lot along a creek or drainage can lag the same date by a week or more on calm clear nights.
Similar climates: Thompsontown, PA, East Salem, PA, McAlisterville, PA, Richfield, PA, Lenkerville, PA.
Frequently asked
- When does it freeze in Millerstown?
- Millerstown's last spring frost typically falls around mid-April, and the first fall frost arrives around mid-November.
- What is the rainy season in Millerstown?
- September is the wettest month with about 4.4 inches of rain on average; the city receives roughly 42 inches annually.
- What is the warmest month in Millerstown?
- July is typically warmest, averaging about 74°F.
- What is the coldest month in Millerstown?
- January is typically coldest, averaging about 29°F.
- When can I start a vegetable garden in Millerstown?
- 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 Millerstown get?
- Millerstown averages about 83 rainy days per year.
- What hardiness zone is Millerstown?
- Millerstown'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
Millerstown, Pennsylvania sits in a warm-summer humid continental climate zone. January means hover near 29°F while July averages 74°F — a 45°F seasonal swing.
Across the year, Millerstown receives about 42 inches of precipitation spread over roughly 83 rainy days.
The rhythm of the year is set by latitude (40.6°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.