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Topsham, VT Weather
Topsham, Vermont sits at 44.1557, -72.2459. Its warmest month is July, when the day usually reaches 81F, and its coldest is January, when the night usually falls to 5F. December is the wettest, with rain on about 15 days. The hottest day in the station record is 98F on June 11, 2008, and the coldest night -33F on January 25, 2011. 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 Topsham weather
Topsham sits at 44.1557, -72.2459 and covers about 48.922 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.
Where these numbers come from
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.
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 Topsham
Topsham is warmest in July, when the day usually reaches 81F, and coldest in January, when the night usually falls to 5F. December is the wettest month, with rain on about 15 days of it.
Usual high and low, by month
Days with rain, by month
The same year as numbers
Month
Usual high
Usual low
Rain days
Snow days
January
27F
5F
14
12
February
30F
6F
11
9
March
40F
16F
12
7
April
53F
29F
13
2
May
67F
40F
14
0
June
76F
49F
14
0
July
81F
54F
14
0
August
80F
52F
11
0
September
72F
45F
10
0
October
57F
34F
14
0
November
44F
25F
12
4
December
32F
14F
15
10
Thirty-year normals, 1991 to 2020, computed from the daily record, measured at the Plainfield station 11.8 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.
Topsham weather history, back to 1940
Pick any month back to 1940 and see what the archive holds for Topsham: the reanalysis record of what happened, day by day.
Reading this month last year to start you off.
Topsham weather records
In 37,589 days of observations Topsham has been as hot as 98F and as cold as -33F. Not averages: the actual days.
Hottest day
98F
June 11, 2008
Coldest night
-33F
January 25, 2011
Wettest day
6.38 in
August 29, 2011
Biggest snow
16.9 in
March 15, 2017
NOAA GHCN daily station records, observed 1999 to 2026: temperature at the Plainfield station, 11.8 miles away; precipitation at the Groton 4.4 Wsw station, 3.2 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 Topsham weather
Common questions
What is the weather usually like in Topsham, VT?
Topsham is warmest in July, when the day usually reaches 81F, and coldest in January, when the night usually falls to 5F. Rain falls on roughly 154 days a year, most often in December. Averages are thirty-year normals, 1991 to 2020, computed from the nearest NOAA station's own daily record.
How much does it rain in Topsham, VT?
About 154 days a year see at least a hundredth of an inch, which is the Weather Service's measurable-precipitation mark. December is the wettest month with rain on about 15 of its days, and September the driest with about 10.
Does it snow in Topsham, VT?
Yes. Snow falls on about 44 days a year, most often in January, which averages about 12 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 Topsham, VT?
The hottest day measured for Topsham reached 98F on June 11, 2008, and the coldest night -33F on January 25, 2011. Both are real NOAA station measurements from the GHCN daily archive, observed 1999 to 2026, at the Plainfield station. Not estimates, though the official state record may live at a different station.
Can I look up past weather for Topsham, VT?
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 Topsham 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.