Rising Sun-Lebanon, Delaware Weather
Fireflies rise from the lawn. Day 77 of spring. Read this microseason across nine climate regions →
Rising Sun-Lebanon weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——86°55°—
- FridayJun 5Overcast——92°64°+6°
- SaturdayJun 6Overcast13%—89°66°-3°
- SundayJun 7Light Drizzle32%—85°69°-4°
- MondayJun 8Light Drizzle16%—70°58°-15°
- TuesdayJun 9Overcast——78°53°+8°
- WednesdayJun 10Clear10%—84°58°+6°
Ozone at AQI 35 now. AQI down 26 over the last 6 hours — air quality is improving sharply. With UV 3.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 16 by mid-afternoon.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 7 AM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 35 now. With UV 3.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 16 by mid-afternoon.
- Present
- AQI 35
- UV peak
- 3.3 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 16
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
- 3:27 AM
- Moonset
- 1:04 PM
- In sign
- ♑︎ Capricorn
Fireflies rise from the lawn
Rising Sun-Lebanon at a glance
- Today vs. normal: 16°F below the seasonal normal for this latitude
- Last frost: April 11 (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.
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
Rising Sun-Lebanon's warmest month is July (~77°F mean) and its coldest is January (~35°F). Rainfall peaks in September (4.8 inches) and bottoms out in February (2.9 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 35° | 3.6″ | 7 |
| February | 36° | 2.9″ | 6 |
| March | 43° | 4.0″ | 7 |
| April | 54° | 3.4″ | 7 |
| May | 63° | 3.7″ | 6 |
| June | 72° | 4.2″ | 7 |
| July | 77° | 4.0″ | 6 |
| August | 75° | 4.5″ | 5 |
| September | 68° | 4.8″ | 6 |
| October | 57° | 4.2″ | 6 |
| November | 47° | 3.2″ | 6 |
| December | 39° | 3.8″ | 7 |
Regional context
Rising Sun-Lebanon's baseline climate, derived from NOAA NCEI 1991-2020 normals at the nearest reporting station, swings from a January mean of 35°F to a July mean of 77°F — a 42°F seasonal arc typical of the mid-latitude bands. Annual precipitation runs about 46.3 inches spread across roughly 75 days with measurable rain or snow each year.
Rainfall stays relatively even across the calendar: September tops out at 4.8 inches across 5.9 days with measurable rain, and February settles around 2.9 inches across 5.6 rainy days — a comparatively narrow seasonal range. That even-rainfall rhythm puts Rising Sun-Lebanon alongside places like Highland Acres, DE, Dover Base Housing, DE and Kent Acres, DE — places without a single dominant storm season, where moisture arrives steadily across the calendar.
The frost-sensitive growing window opens around mid-April, when overnight lows reliably clear freezing for cool-season crops like peas, lettuce, spinach, and radishes. Heat-loving transplants like tomatoes, peppers, and squash generally hold off for another 10-14 days to clear the last spring frost risk window. 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 Rising Sun-Lebanon 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: Highland Acres, DE, Dover Base Housing, DE, Kent Acres, DE, Magnolia, DE, Rodney Village, DE.
Frequently asked
- When does it freeze in Rising Sun-Lebanon?
- Rising Sun-Lebanon's last spring frost typically falls around mid-April, and the first fall frost arrives around mid-November.
- What is the rainy season in Rising Sun-Lebanon?
- September is the wettest month with about 4.8 inches of rain on average; the city receives roughly 46 inches annually.
- What is the warmest month in Rising Sun-Lebanon?
- July is typically warmest, averaging about 77°F.
- What is the coldest month in Rising Sun-Lebanon?
- January is typically coldest, averaging about 35°F.
- When can I start a vegetable garden in Rising Sun-Lebanon?
- 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 Rising Sun-Lebanon get?
- Rising Sun-Lebanon averages about 75 rainy days per year.
- What hardiness zone is Rising Sun-Lebanon?
- Rising Sun-Lebanon'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
Rising Sun-Lebanon, Delaware sits in a warm-summer humid continental climate zone. January means hover near 35°F while July averages 77°F — a 42°F seasonal swing.
Across the year, Rising Sun-Lebanon receives about 46 inches of precipitation spread over roughly 75 rainy days.
The rhythm of the year is set by latitude (39.1°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.