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Wilton, CT Weather
Wilton, Connecticut sits at 41.2113, -73.4410. Its warmest month is July, when the day usually reaches 83F, and its coldest is January, when the night usually falls to 18F. May is the wettest, with rain on about 14 days. The hottest day in the record is 100F on August 9, 2001, and the coldest night -14F on January 7, 2018. This page carries live conditions, an hour by hour timeline, a ten day outlook, radar, monthly averages and searchable daily history back to 1940.
About Wilton weather
Wilton sits at 41.2113, -73.4410 and covers about 26.8 square miles. The forecast above is live: current conditions lead with the HRRR model, corrected against the nearest reporting station and against radar overhead, because a model can lag a storm and the radar cannot.
The tabs at the top of this page carry the hour by hour timeline, the ten day outlook and live radar. Where the models disagree about a day, the rock says so on the day rather than quietly picking a winner.
The rock grades itself against what actually happened and publishes the result whether it flatters it or not. Those standings live in the Receipts, in one place, so they stay current instead of going stale on three hundred town pages.
- Current conditions and forecast: NOAA forecast grids (the National Weather Service digital forecast, the National Blend of Models, HRRR and GFS) decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
- Warnings and alerts: the National Weather Service, passed through unchanged.
- Radar: NOAA MRMS merged reflectivity, the multi-radar multi-sensor composite, rendered into tiles by myweatherrock.
- Monthly averages and records: computed by myweatherrock from NOAA GHCN-Daily station records at the nearest qualifying station, named on this page with its distance. Measurements, not estimates.
- Daily history search: the town's own NOAA GHCN-Daily station file, held on our server, measurements by day. Months the station missed fall back to the Open-Meteo historical archive (reanalysis), and the page says so when it does.
- Water and tides: NOAA and USGS gauges where one is near.
What the weather is usually like in Wilton
Wilton is warmest in July, when the day usually reaches 83F, and coldest in January, when the night usually falls to 18F. May is the wettest month, with rain on about 14 days of it.
The same year as numbers
| Month | Usual high | Usual low | Rain days |
|---|---|---|---|
| January | 36F | 18F | 11 |
| February | 39F | 20F | 10 |
| March | 47F | 28F | 11 |
| April | 59F | 37F | 12 |
| May | 69F | 47F | 14 |
| June | 77F | 56F | 13 |
| July | 83F | 62F | 13 |
| August | 81F | 61F | 14 |
| September | 74F | 53F | 14 |
| October | 62F | 42F | 13 |
| November | 52F | 32F | 11 |
| December | 41F | 24F | 12 |
Thirty-year normals, 1991 to 2020, computed from the daily record, measured at the Danbury Muni Ap station 11.3 miles away. A rain day means at least a hundredth of an inch fell, the same measurable-precipitation mark the Weather Service uses. Source: computed from the station record, NOAA GHCN daily.
Wilton weather history, back to 1940
Pick any month back to 1940 and see what actually happened in Wilton. Reanalysis fitted to observations, not a forecast.
Reading this month last year to start you off.
Wilton weather records
In 29,135 days of observations Wilton has been as hot as 100F and as cold as -14F. Not averages: the actual days.
NOAA GHCN daily station records, observed 1998 to 2025: temperature at the Danbury Muni Ap station, 11.3 miles away; snowfall at the Danbury station, 13.1 miles away. Station measurements, not estimates. Record dates reflect the station's own observation schedule, and the official state record may live at a different station.
Common questions about Wilton weather
What is the weather usually like in Wilton, CT?
Wilton is warmest in July, when the day usually reaches 83F, and coldest in January, when the night usually falls to 18F. Rain falls on roughly 148 days a year, most often in May. Averages are thirty-year normals, 1991 to 2020, computed from the nearest NOAA station's own daily record.
How much does it rain in Wilton, CT?
About 148 days a year see at least a hundredth of an inch, which is the Weather Service's measurable-precipitation mark. May is the wettest month with rain on about 14 of its days, and February the driest with about 10.
What is the hottest it has ever been in Wilton, CT?
The hottest day measured at the station serving Wilton reached 100F on August 9, 2001, and the coldest night -14F on January 7, 2018. Both are real NOAA station measurements from the GHCN daily archive, observed 1998 to 2025, at the Danbury Muni Ap station. Not estimates, though the official state record may live at a different station.
Can I look up past weather for Wilton, CT?
Yes, and for free. The History tab on this page takes any month back to 1940 and shows every day of it: the high, the low, what fell, and that month's hottest and coldest day. No account and no payment.
Is the Wilton forecast on this page free, and does it track me?
It is free, carries no advertising, and needs no account. Nothing about a visitor leaves the device except the coordinates needed to fetch a forecast, and those are not stored against anyone.