Thompsonville, Connecticut Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Thompsonville weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Heavy Drizzle18%0.05″94°77°—
- SundayJul 5Light Rain41%0.06″89°70°-5°
- MondayJul 6Showers70%2.5″73°61°-16°
- TuesdayJul 7Light Rain60%0.21″62°59°-11°
- WednesdayJul 8Overcast——83°55°+21°
- ThursdayJul 9Light Drizzle16%—94°62°+11°
- FridayJul 10Light Drizzle36%—87°66°-7°
AQI 39 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±4 points). Ozone at AQI 43. Overcast through the UV peak window (cloud cover ~67%) — afternoon ozone should stay flat.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 5 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 43. Overcast through the UV peak window (cloud cover ~67%) — afternoon ozone should stay flat.
- Present
- AQI 43
- UV peak
- 0.3 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 5
PM × Wind × Precip
PM2.5 at 7.6 µg/m³, PM10 at 8.3 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.92
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- background
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).








































If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 10:47 PM
- Moonset
- 9:51 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Thompsonville at a glance
- Today vs. normal: 10°F above the seasonal normal for this latitude
- Last frost: April 28 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
15-Day Forecast — Thompsonville
- Sat94°77°18%
- Sun89°70°41%
- Mon73°61°70%
- Tue62°59°60%
- Wed83°55°8%
- Thu94°62°16%
- Fri87°66°36%
- Sat85°56°23%
- Sun71°61°24%
- Mon82°62°17%
- Tue92°64°20%
- Wed79°61°26%
- Thu85°58°29%
- Fri91°62°34%
- Sat75°65°45%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 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 — Thompsonville
SPC includes Thompsonville in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
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.
Microseason · July 1–5
Cicadas claim the afternoon
Annual cicada buzz begins, peaking in the heat of the day.
Day 185 of 365 · Wedge 37 of 72
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
In Thompsonville, July runs warmest near 73°F and January coldest around 25°F, while October is the wettest month (4.7 inches) and February the driest (2.6 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 25° | 2.8″ | 5 |
| February | 28° | 2.6″ | 6 |
| March | 36° | 3.4″ | 6 |
| April | 48° | 4.1″ | 7 |
| May | 59° | 3.7″ | 8 |
| June | 67° | 4.4″ | 8 |
| July | 73° | 4.2″ | 7 |
| August | 71° | 3.7″ | 7 |
| September | 63° | 4.6″ | 6 |
| October | 51° | 4.7″ | 7 |
| November | 41° | 3.5″ | 6 |
| December | 31° | 3.6″ | 7 |
Regional context
In Thompsonville, NOAA NCEI 1991-2020 normals put January near 25°F and July near 73°F — a 48°F seasonal arc — with about 45.2 inches of precipitation over 78 rainy or snowy days.
Thompsonville's precipitation spreads evenly: October peaks at 4.7 inches on 6.7 wet days, while February holds 2.6 inches over 5.8 — no month dominates Thompsonville's rain calendar. It is a balanced pattern Thompsonville shares with places like Sherwood Manor, CT, Southwood Acres, CT and Suffield Depot, CT.
Thompsonville reaches its last hard frost near mid-April; that is the cue for kale, peas, spinach, and parsnips. Heat-demanding starts go out a fortnight on in Thompsonville, after the soil warms and cold snaps clear. By mid-November, frost is back in Thompsonville — protect or harvest anything tender. Thompsonville's low ground holds frost later into spring than Thompsonville's benches, which run 3-5 days ahead.
Similar climates: Sherwood Manor, CT, Southwood Acres, CT, Suffield Depot, CT, Hazardville, CT, Broad Brook, CT.
Frequently asked
- When does it freeze in Thompsonville?
- Frost typically leaves Thompsonville by mid-April and returns to Thompsonville near mid-November.
- What is the rainy season in Thompsonville?
- Thompsonville sees its heaviest rain in October (around 4.7 inches), part of roughly 45 inches a year.
- What is the warmest month in Thompsonville?
- Thompsonville peaks in July, when the mean runs near 73°F.
- What is the coldest month in Thompsonville?
- January is Thompsonville's coldest month, averaging about 25°F.
- When can I start a vegetable garden in Thompsonville?
- In Thompsonville, sow peas and hardy greens around mid-April; Thompsonville's tomatoes and peppers wait two weeks more.
- How many rainy days does Thompsonville get?
- Expect roughly 78 wet days a year in Thompsonville.
- What hardiness zone is Thompsonville?
- Since January in Thompsonville averages 25°F, Thompsonville's USDA zone follows that floor — confirm it by ZIP.
- What is the 10-day forecast for Thompsonville?
- Thompsonville'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 Thompsonville?
- See this week's day-by-day rain chances for Thompsonville in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Thompsonville?
- Current conditions for Thompsonville and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Thompsonville forecast updated?
- The Thompsonville forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Thompsonville?
- Today's sunrise and sunset times for Thompsonville 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 Thompsonville?
- The next few days in Thompsonville's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Climate
The warm-summer humid continental climate of Thompsonville, Connecticut carries typical Januarys near 25°F and Julys around 73°F — 48°F of seasonal travel.
Thompsonville sees close to 45 inches of precipitation annually, falling across some 78 wet days.
Thompsonville sits at 42.0°N; that 48°F seasonal swing frames planting windows and frost dates across Thompsonville.
ZIP codes in Thompsonville
- 06082