Weather in Danbury, Connecticut
Roses open along the stoops. Day 59 of spring. Read this microseason across nine climate regions →
When the dew is on the grass, rain will never come to pass.
- Moonrise
- 9:36 AM
- Moonset
- 12:34 AM
- In sign
- ♉︎ Taurus
Roses open along the stoops
Danbury at a glance
- Today vs. normal: NaN°F below the seasonal normal for this latitude
- Last frost: April 24 (climatological average for this latitude)
- Microseason: 28 of 72, May 16–20
- Planting window: Direct sow okra, melons, and southern peas. Thin carrot rows.
Right now in the garden
Warm-season window is open
As of May 17, the last spring frost has passed for most years. Transplant tomatoes, peppers, eggplants, basil, and cucurbits (cucumbers, squash, melons) now. Direct-sow beans and corn into warm soil.
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
July brings Danbury's peak warmth with average temperatures around 72°F, while January delivers the year's coldest conditions at roughly 27°F. September typically sees the heaviest rainfall at 4.8 inches, compared to February's lighter 2.7 inches.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 27° | 3.1″ | 6 |
| February | 29° | 2.7″ | 5 |
| March | 37° | 3.9″ | 7 |
| April | 48° | 3.7″ | 7 |
| May | 58° | 3.8″ | 8 |
| June | 67° | 4.5″ | 7 |
| July | 72° | 4.5″ | 7 |
| August | 70° | 4.6″ | 7 |
| September | 63° | 4.8″ | 6 |
| October | 52° | 4.5″ | 6 |
| November | 41° | 3.8″ | 6 |
| December | 32° | 4.2″ | 7 |
Regional context
Danbury falls within the warm-summer humid continental climate region, sharing temperature ranges, seasonal patterns, and growing conditions with other cities in this climate zone.
Similar climates: Hartford, CT, Bridgeport, CT, New Haven, CT, Waterbury, CT, Norwich, CT.
Naturalist notes
Late May brings the peak migration of warblers through Danbury's woodlands, with yellow warblers and American redstarts arriving to establish breeding territories.
Apple trees complete their blooming cycle by early May, as petals give way to small green fruits that will mature through the summer months.
Frequently asked
- When does it freeze in Danbury?
- Danbury typically experiences its last spring frost around mid-April, while the first fall frost usually arrives around mid-November.
- What is the rainy season in Danbury?
- September ranks as the wettest month, averaging about 4.8 inches of rainfall, while the city receives roughly 48 inches annually.
- What is the warmest month in Danbury?
- July typically brings the warmest temperatures, averaging about 72°F.
- What is the coldest month in Danbury?
- January usually delivers the coldest temperatures, averaging about 27°F.
- When can I start a vegetable garden in Danbury?
- Cool-season crops like peas and lettuce can be planted around the last spring frost in mid-April, while warm-season crops such as tomatoes and peppers should wait 1–2 weeks after.
- How many rainy days does Danbury get?
- Danbury experiences about 78 rainy days per year on average.
- What hardiness zone is Danbury?
- Danbury's USDA hardiness zone depends on its lowest average winter temperature; the USDA's online lookup tool can provide the current zone designation using the city ZIP code.
Climate
Danbury, Connecticut experiences a warm-summer humid continental climate. Winter temperatures in January typically hover near 27°F, while July averages reach 72°F, creating a 45°F seasonal swing.
Annual precipitation totals approximately 48 inches, distributed across roughly 78 rainy days throughout the year.
Geography shapes Danbury's weather patterns through its latitude of 41.4°N, proximity to large water bodies, and local elevation. These factors determine growing seasons, frost timing, and daily weather variations.