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Bristol, NH Weather
Bristol, New Hampshire sits at 43.6244, -71.7103. Its warmest month is July, when the day usually reaches 83F, and its coldest is January, when the night usually falls to 10F. October is the wettest, with rain on about 12 days. The hottest day in the station record is 102F on August 10, 1949, and the coldest night -36F on January 14, 1957. 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 Bristol weather
Bristol sits at 43.6244, -71.7103 and covers about 16.744 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.
- 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, 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.
What the weather is usually like in Bristol
Bristol is warmest in July, when the day usually reaches 83F, and coldest in January, when the night usually falls to 10F. October is the wettest month, with rain on about 12 days of it.
The same year as numbers
| Month | Usual high | Usual low | Rain days | Snow days |
|---|---|---|---|---|
| January | 30F | 10F | 8 | 3 |
| February | 34F | 11F | 8 | 3 |
| March | 41F | 20F | 9 | 2 |
| April | 55F | 31F | 9 | 0 |
| May | 69F | 44F | 9 | 0 |
| June | 76F | 51F | 10 | 0 |
| July | 83F | 58F | 10 | 0 |
| August | 80F | 57F | 9 | 0 |
| September | 72F | 49F | 9 | 0 |
| October | 59F | 39F | 12 | 0 |
| November | 45F | 25F | 8 | 1 |
| December | 35F | 18F | 11 | 3 |
Thirty-year normals, 1991 to 2020, computed from the daily record, measured at the Franklin Falls Dam station 11 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.
Bristol weather history, back to 1940
Pick any month back to 1940 and see what the archive holds for Bristol: the reanalysis record of what happened, day by day.
Reading this month last year to start you off.
Bristol weather records
In 72,829 days of observations Bristol has been as hot as 102F and as cold as -36F. Not averages: the actual days.
NOAA GHCN daily station records, observed 1948 to 2026: temperature at the Franklin Falls Dam station, 11 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 Bristol weather
What is the weather usually like in Bristol, NH?
Bristol is warmest in July, when the day usually reaches 83F, and coldest in January, when the night usually falls to 10F. Rain falls on roughly 112 days a year, most often in October. Averages are thirty-year normals, 1991 to 2020, computed from the nearest NOAA station's own daily record.
How much does it rain in Bristol, NH?
About 112 days a year see at least a hundredth of an inch, which is the Weather Service's measurable-precipitation mark. October is the wettest month with rain on about 12 of its days, and January the driest with about 8.
Does it snow in Bristol, NH?
Yes. Snow falls on about 12 days a year, most often in January, which averages about 3 snowy days. Those are days with measurable snowfall, not days with snow lying on the ground.
What is the hottest it has ever been in Bristol, NH?
The hottest day measured for Bristol reached 102F on August 10, 1949, and the coldest night -36F on January 14, 1957. Both are real NOAA station measurements from the GHCN daily archive, observed 1948 to 2026, at the Franklin Falls Dam station. Not estimates, though the official state record may live at a different station.
Can I look up past weather for Bristol, NH?
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 Bristol 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.