Union Village Dam, Vermont climate: Climate normals at a NOAA weather station
Union Village Dam's normal year runs from 6°F January nights to 82°F July afternoons, with 39.9 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 6.9°C, January lows of −14°C, July highs of 28°C, 1,012 mm of precipitation a year.
- NOAA stationUnion Village Dam
- Station IDUSC00438556
- Location43.79°N 72.26°W
- Elevation460 ft (140 m)
On October 23, the normal high in Union Village Dam is 55°F and the normal low 33°F, and the chance of measurable rain or snow is 40%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Union Village Dam.
- Jan 29° 6°
- Feb 32° 8°
- Mar 41° 18°
- Apr 55° 29°
- May 68° 42°
- Jun 77° 52°
- Jul 82° 57°
- Aug 81° 55°
- Sep 73° 47°
- Oct 59° 36°
- Nov 46° 26°
- Dec 34° 16°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Union Village Dam each month?
July is the warmest month, with normal highs of 82°F; January the coldest, with normal lows of 6°F. The most precipitation falls in October (4.32 in), the least in February (2.25 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 29°F | 6°F | 17.7°F | 2.65 | 11 | <1 | 31 | 9 h 20 min |
| February | 32°F | 8°F | 19.8°F | 2.25 | 10 | <1 | 28 | 10 h 30 min |
| March | 41°F | 18°F | 29.4°F | 2.68 | 10 | <1 | 29 | 11 h 50 min |
| April | 55°F | 29°F | 42.2°F | 2.87 | 10 | <1 | 20 | 13 h 20 min |
| May | 68°F | 42°F | 55.0°F | 3.55 | 14 | 1 | 3 | 14 h 40 min |
| June | 77°F | 52°F | 64.3°F | 4.06 | 14 | 2 | <1 | 15 h 30 min |
| July | 82°F | 57°F | 69.4°F | 4.27 | 13 | 5 | <1 | 15 h 10 min |
| August | 81°F | 55°F | 67.8°F | 3.67 | 12 | 1 | <1 | 14 h |
| September | 73°F | 47°F | 59.8°F | 3.42 | 10 | 1 | 1 | 12 h 30 min |
| October | 59°F | 36°F | 47.1°F | 4.32 | 14 | <1 | 11 | 11 h 10 min |
| November | 46°F | 26°F | 35.7°F | 3.07 | 10 | <1 | 25 | 9 h 40 min |
| December | 34°F | 16°F | 25.1°F | 3.05 | 13 | <1 | 29 | 9 h |
| Year (annual) | 56°F | 33°F | 44.4°F | 39.86 | 141 | 9 | 178 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | −2°C | −14°C | −7.9°C | 67 mm |
| February | 0°C | −13°C | −6.8°C | 57 mm |
| March | 5°C | −8°C | −1.4°C | 68 mm |
| April | 13°C | −1°C | 5.7°C | 73 mm |
| May | 20°C | 5°C | 12.8°C | 90 mm |
| June | 25°C | 11°C | 17.9°C | 103 mm |
| July | 28°C | 14°C | 20.8°C | 108 mm |
| August | 27°C | 13°C | 19.9°C | 93 mm |
| September | 23°C | 8°C | 15.4°C | 87 mm |
| October | 15°C | 2°C | 8.4°C | 110 mm |
| November | 8°C | −3°C | 2.1°C | 78 mm |
| December | 1°C | −9°C | −3.8°C | 77 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Hanover (6 miles away), gets 61 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00438556; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
Which months are mildest at Union Village Dam?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, September has the fewest days with rain (10).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00438556.
When is the last frost at Union Village Dam?
In Union Village Dam, the last spring frost (32°F) comes after May 9 in half of years and after May 22 in one year in ten; the first autumn frost comes before October 2 in half of years and before September 20 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- May 91 year in 10 after May 22; 9 in 10 after April 29
- First autumn frost, half of years before
- October 21 year in 10 before September 20; 9 in 10 before October 15
NOAA puts the median frost-free season at 145 days, and the season without a hard freeze (28°F) at 165 days.
A hard freeze (28°F) comes after April 30 in half of springs and before October 12 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Union Village Dam in zone 5a in ZIP code 05043, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, the station is in zone 5a: the coldest night of a typical year reaches −19°F (15 complete years).
Frost dates for every NOAA station in Vermont · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00438556; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get at Union Village Dam?
In a normal year in Union Village Dam, 9 days a year reach 90°F, 178 nights fall to 32°F or colder and 141 days bring measurable precipitation.
- Days at 90°F or more
- 9a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 178a normal year
- Days that stay below freezing
- 54high of 32°F or less
- Days with 0.01 inch of precipitation
- 141a normal year
The highest temperature in this station's record (since 1951) is 100°F, on June 21, 2024; the lowest is −27°F, on January 25, 2011.
The wettest calendar year on that record is 2023, with 52.27 in; the snowiest season is 1970–71, with 120.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00438556; records: ACIS (NOAA Regional Climate Centers), station USC00438556. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Union Village Dam?
Over a year 69% of the sunlight that would reach the ground under clear skies gets through the clouds at Union Village Dam, 3.7 kWh per square metre a day. August is the sunniest month (76%) and December the cloudiest (57%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 63% | 1.6 |
| February | 67% | 2.5 |
| March | 68% | 3.7 |
| April | 67% | 4.6 |
| May | 67% | 5.2 |
| June | 69% | 5.6 |
| July | 75% | 5.8 |
| August | 76% | 5.2 |
| September | 75% | 4.2 |
| October | 64% | 2.6 |
| November | 64% | 1.7 |
| December | 57% | 1.2 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How many heating and cooling degree days does Union Village Dam record?
A normal year at Union Village Dam brings 7,847 heating degree days, 46% more than the median U.S. place (5,373), and 393 cooling degree days, 57% fewer than the median (908). Eight months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,186 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,467 | 0 |
| February | 1,265 | 0 |
| March | 1,103 | 0 |
| April | 683 | 1 |
| May | 321 | 11 |
| June | 90 | 67 |
| July | 17 | 153 |
| August | 33 | 120 |
| September | 196 | 40 |
| October | 554 | 1 |
| November | 879 | 0 |
| December | 1,237 | 0 |
| Year (annual) | 7,847 | 393 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00438556. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Have recent years at Union Village Dam been warmer than normal?
2025 averaged 45.0°F, 0.6°F above the 1991-2020 normal of 44.4°F. 5 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 46.8°F | +2.4°F | – |
| 2022 | 46.0°F | +1.6°F | 37.89 |
| 2023 | 47.9°F | +3.5°F | 52.27 |
| 2024 | 48.2°F | +3.8°F | 39.96 |
| 2025 | 45.0°F | +0.6°F | 38.16 |
Source: observed years: ACIS, station USC00438556. A year counts only with all twelve months complete.
How does Union Village Dam's climate compare?
Union Village Dam is warmer than 16 of the 29 places with their own NOAA record in Vermont, and wetter than 7. Across the 7,247 U.S. stations with normals, its annual mean of 44.4°F is warmer than 17%.
In the Köppen classification computed from these normals, Union Village Dam is Dfb: continental, no dry season, warm summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Union Village Dam share this climate record?
Canaan has no NOAA station with 1991-2020 normals of its own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Canaan, NH3,820 people · 16 mi SE
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Union Village Dam's climate
What is the coldest month at Union Village Dam?
January, with a normal high of 29°F and a normal low of 6°F. The warmest is July (82°F by day, 57°F at night).
Does it snow at Union Village Dam?
Yes. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, Hanover (6 miles away), records 61 inches of snow in a normal year.
What is the rainiest month at Union Village Dam?
October, with 4.32 in of precipitation in a normal year; the driest is February with 2.25 in.
What plant hardiness zone is Union Village Dam in?
The USDA's 2023 map puts Union Village Dam in zone 5a in ZIP code 05043, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches −19°F (15 years, 1991-2020): zone 5a.
How late can frost come at Union Village Dam?
In half of years the last 32°F night comes after May 9; in one year in ten it comes after May 22. Waiting until May 22 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Vermont climateThe statewide normals and every place in the state
- Hanover, NH6 miles from this station, 47.9°F a year
- Lebanon, NH12 miles from this station, 46.0°F a year
- North Hartland, VT14 miles from this station, 44.2°F a year
- Corinth, VT15 miles from this station, 41.4°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made