Danbury, Connecticut Weather
Apples hang heavy on the branch. Day 93 of summer. Read this microseason across nine climate regions →
Danbury weather forecast — hour by hour, 7-day outlook, NOAA radar
Conditions updated 5:20 AM EDT · Open-Meteo
- TodaySep 21Overcast——67°57°—
- TuesdaySep 22Overcast——63°50°-4°
- WednesdaySep 23Overcast——63°48°0°
- ThursdaySep 24Overcast20%—65°46°+2°
- FridaySep 25Heavy Rain49%1.9″56°49°-9°
- SaturdaySep 26Drizzle47%0.12″56°53°0°
- SundaySep 27Light Rain32%1.1″55°52°-1°
Air quality now AQI 24 · Good
AQI 24 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points).
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 3 PM.
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).
September dries up ditches or breaks down bridges.
- Moonrise
- 4:30 PM
- Moonset
- 1:07 AM
- In sign
- ♑︎ Capricorn
Apples hang heavy on the branch
Read this microseason across nine climate regions →
All 72 microseasons on the year wheel →
Danbury at a glance
- Today vs. normal: Today averages 62°F (high 67°F, low 57°F), 3°F above the 59°F normal for Sep 21
- Last frost: May 1 (1991–2020 median, NOAA station 4 km away)
- Microseason: Sep 21–25
- Planting calendar: September — plant garlic (overwinter); harvest tomatoes, peppers, beans, summer squash, winter squash
15-Day Forecast — Danbury
- Mon67°57°8%
- Tue63°50°2%
- Wed63°48°1%
- Thu65°46°20%
- Fri56°49°49%
- Sat56°53°47%
- Sun55°52°32%
- Mon57°53°18%
- Tue61°53°11%
- Wed59°55°18%
- Thu66°49°18%
- Fri65°44°16%
- Sat73°51°10%
- Sun75°55°16%
- Mon59°51°10%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Danbury
Interactive wind and temperature map centered on Danbury — it loads in your browser. Open the full weather map.
Right now in the garden
Fall planting + final harvests
As of September 21, the season's first frost (typically October 14) is approaching. Pick what frost-tender plants still carry before the next cold front. This city's planting calendar for September: plant garlic (overwinter); harvest tomatoes, peppers, beans, summer squash, and winter squash.
Sun & seasons in Danbury
Danbury sits in Western Connecticut County, where the year’s longest day runs 15h 10m of daylight and its shortest just 9h 11m — a swing of +6h between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.
Hartford, the state’s largest city, lies about 48 miles to the ENE. The nearest town Danbury tracks is Bridgeport, roughly 20 miles to the SE.
Air quality in Danbury
Air quality in Danbury’s county has trended cleaner since 2020; its cleanest year on record was 2024 (median AQI 42). See the full air-quality history for Danbury.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| April | lettuce, peas, spinach, radishes | — |
| May | lettuce, peas, spinach, radishes | lettuce, spinach, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes |
| July | tomatoes, peppers, beans, squash, fall brassicas, carrots | lettuce, peas, spinach, beans, summer squash, garlic |
| August | — | tomatoes, peppers, beans, summer squash, garlic |
| September | garlic (overwinter) | tomatoes, peppers, beans, summer squash, winter squash |
| October | — | tomatoes, peppers, beans, summer squash, winter squash, fall brassicas, carrots |
| November | — | fall brassicas, carrots |
A year in weather
Danbury peaks at about 70°F in July and bottoms near 25°F in January; December brings the heaviest rain (5.0 inches) and February the least (3.0 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 25° | 3.9″ | 8 |
| February | 28° | 3.0″ | 7 |
| March | 35° | 4.2″ | 7 |
| April | 47° | 3.5″ | 8 |
| May | 57° | 4.1″ | 9 |
| June | 65° | 4.6″ | 8 |
| July | 70° | 4.2″ | 8 |
| August | 68° | 4.9″ | 7 |
| September | 61° | 4.9″ | 6 |
| October | 50° | 4.2″ | 7 |
| November | 40° | 3.9″ | 6 |
| December | 31° | 5.0″ | 8 |
Regional context
Similar climates Ridgebury, CT, Taylor Corners, CT, Kellogg Point, CT
By the nearest station's NOAA NCEI 1991-2020 normals, Danbury sees 25°F Januarys and 70°F Julys, a 45°F range, plus around 50.4 inches of precipitation across 87 days.
Danbury's precipitation spreads evenly across the seasons: December peaks at 5.0 inches on 7.9 wet days, while February holds 3.0 inches over 6.9 — no season dominates Danbury's rain calendar. It is a balanced pattern Danbury shares with places like Ridgebury, CT, Taylor Corners, CT and Kellogg Point, CT.
Danbury's growing window opens around May 1, once Danbury's overnight lows stop freezing — sow kale, peas, spinach, and parsnips. Hold Danbury's tender crops — tomatoes, peppers, basil — until 10-14 days past Danbury's last frost. Around October 14, freezing nights resume in Danbury and tender crops must come in. In about half of years, Danbury's last freeze comes after May 1.
Similar climates: Ridgebury, CT, Taylor Corners, CT, Kellogg Point, CT, Lakes East, CT, Bigelow Corners, CT.
Frequently asked
- When does it freeze in Danbury?
- Danbury's last spring frost lands near May 1, and in Danbury the first fall frost follows around October 14.
- What is the rainy season in Danbury?
- December is the wettest month in Danbury, about 5.0 inches on average; the year totals roughly 50 inches.
- What is the warmest month in Danbury?
- July is Danbury's warmest month, averaging about 70°F.
- What is the coldest month in Danbury?
- Danbury bottoms out in January, with a mean near 25°F.
- When can I start a vegetable garden in Danbury?
- Frost-hardy sowings begin at May 1 in Danbury; warm-season starts follow two weeks on.
- How many rainy days does Danbury get?
- Danbury averages about 87 days with measurable rain or snow each year.
- What hardiness zone is Danbury?
- Danbury's USDA zone comes from its January mean (25°F); enter the ZIP on the USDA lookup for the number.
- What is the 10-day forecast for Danbury?
- Danbury'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 Danbury?
- See this week's day-by-day rain chances for Danbury in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Danbury?
- Current conditions for Danbury and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Danbury forecast updated?
- The Danbury forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Danbury?
- Today's sunrise and sunset times for Danbury 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 Danbury?
- The next few days in Danbury's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Danbury sits at 41.4°N; its climate zone is warm-summer humid continental (Köppen approximation).
ZIP codes in Danbury
- 06810
- 06811
- 06813