W Thompson Lake, CT Climate: Temperature & Rain by Month
Annual temperature and rainfall from NOAA NCEI's 1991–2020 normals →; comfort score computed by PlainClimate
30-year climate normals (1991-2020) from W Thompson Lake's primary NOAA station, W THOMPSON LAKE.
The climate verdict for W Thompson Lake
Water is the standout signal in W Thompson Lake, Connecticut: 50.1 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 48°F. At 49/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 18% of scores.
- 48°F
- average temperature, NOAA 1991-2020 normal
- 49/100
- comfort score, above 18% of station-mapped location scores
- 50.1"
- annual precipitation · 39" snow
- 161 days
- frost-free days per growing season
W Thompson Lake: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00069388 · W Thompson Lake, CT 48°F mean · 50.1" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-WET · SWING-WIDE · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 48°F
- RANK-COOL #2,196
- PHOTO-FINISH ≈ Warren
- PRCP-WET 50.1"
- SWING-WIDE 46°F
- COMF-LOW 49/100
- LOAD-HEAT 6,582 HDD
- STN-1 USC00069388
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Warren, PA (+ 0 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every CT station list.
- W Thompson Lake (this station) 48°F
- Hot Grand Haven Wwtp, MI 48°F
- Near Warren, PA 48°F
- Near Deposit, NY 48°F
- Near Emporium, PA 48°F
Climate Living Index · W Thompson Lake
W Thompson Lake: 38/100 · grade F
W Thompson Lake publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for W Thompson Lake, not an official NOAA rating. Rankings still use Comfort Score 49/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 50.1 in · 15.1 from 35 in | 47/100 · D |
| Normal heat + freeze calendar | 153 calendar days | 44/100 · D |
| Frost-free season | 161 days/year | 34/100 · F |
| Annual temperature balance | 48.2°F · 19.3° from 67.5°F | 32/100 · F |
| Snowfall burden | 38.5 inches/year | 29/100 · F |
W Thompson Lake · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
W Thompson Lake is a continental Köppen climate: Dfb
Coldest-month mean 24.9°F and warmest-month mean 71.1°F place this station in continental, no dry season, warm summer climates (Dfb). Class Dfb is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: continental, specifically continental, no dry season, warm summer.
- Köppen code
- Dfb
- Group
- Continental
- Warmest month
- 71.1°F
- Coldest month
- 24.9°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · heating-led station
Where W Thompson Lake sits across the climate record
Three NOAA fields for W Thompson Lake's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 32nd percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- Top 19% wettest
- W Thompson Lake's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- 65th percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How W Thompson Lake compares across U.S. station-mapped locations
W Thompson Lake's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
49 18th percentile score exceeds 18% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). This entry sits in this band.
- 50–60: 1,329 station-mapped locations (21%). Above this entry.
- 60–70: 1,236 station-mapped locations (20%). Above this entry.
- 70–80: 650 station-mapped locations (11%). Above this entry.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
W Thompson Lake's measured station temperature trend
MethodologyAcross 34 complete annual observations from 1968 to 2025, W THOMPSON LAKE warmed at a fitted rate of 0.27°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- W Thompson Lake primary station fitted change +0.27 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 35°F (2°C) | 15°F (-9°C) | 25°F (-4°C) | 3.8" | 10.6" | 29.1 | 0.0 |
| February | 38°F (3°C) | 17°F (-9°C) | 27°F (-3°C) | 3.5" | 11.6" | 26.5 | 0.0 |
| March | 46°F (8°C) | 24°F (-4°C) | 35°F (2°C) | 4.5" | 7.2" | 26.0 | 0.0 |
| April | 58°F (15°C) | 34°F (1°C) | 46°F (8°C) | 4.6" | 1.5" | 14.0 | 0.1 |
| May | 69°F (20°C) | 45°F (7°C) | 57°F (14°C) | 3.4" | 0.0" | 1.8 | 0.6 |
| June | 76°F (25°C) | 54°F (12°C) | 65°F (19°C) | 4.5" | 0.0" | 0.0 | 1.3 |
| July | 82°F (28°C) | 60°F (16°C) | 71°F (22°C) | 4.0" | 0.0" | 0.0 | 3.2 |
| August | 80°F (27°C) | 58°F (15°C) | 69°F (21°C) | 4.2" | 0.0" | 0.0 | 2.0 |
| September | 73°F (23°C) | 51°F (10°C) | 62°F (17°C) | 3.9" | 0.0" | 0.4 | 0.3 |
| October | 61°F (16°C) | 38°F (4°C) | 50°F (10°C) | 4.8" | 0.2" | 10.4 | 0.0 |
| November | 50°F (10°C) | 30°F (-1°C) | 40°F (5°C) | 4.2" | 0.9" | 20.0 | 0.0 |
| December | 40°F (5°C) | 22°F (-6°C) | 31°F (-1°C) | 4.7" | 6.5" | 27.4 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 82°F around July 17, short of 90°F on every date, while 153 dates carry a normal low at or below freezing, the coldest 14°F near January 24.
The freezing stretch
The normal low stays at or below 32°F into April 9, then returns to freezing around November 9, covering 153 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
Where the wet dates fall
The likeliest wet date is May 17, when 41% of years recorded at least a hundredth of an inch. The driest is September 9 at 28%. Summed across the calendar, that is about 128 wet dates a year.
The widest day
April 29 carries the biggest normal gap between afternoon and dawn, 25°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for W Thompson Lake.
Where W Thompson Lake Stands Nationally
The normal water year runs well above the national norm at roughly 50 inches.
W Thompson Lake earns one nationally notable standing (outer quintile) against 6,860 NOAA 1991–2020 normals stations, middle-of-the-pack metrics stay silent here.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 10.6"
11.0 days with precipitation
Snow: 11.6"
9.9 days with precipitation
Snow: 7.2"
10.8 days with precipitation
Snow: 1.5"
11.4 days with precipitation
12.5 days with precipitation
11.3 days with precipitation
10.8 days with precipitation
10.3 days with precipitation
8.8 days with precipitation
Snow: 0.2"
9.9 days with precipitation
Snow: 0.9"
9.4 days with precipitation
Snow: 6.5"
11.5 days with precipitation
W Thompson Lake spreads its precipitation across the year
Neither half of the year dominates here: June through August take 25% of the annual total and December through February 24%, with neither reaching the 35% that would mark a distinct wet season. W Thompson Lake has no dry season to plan around, though it does carry a wide 46.2°F gap between its warmest and coldest month.
The gap between the wettest and driest month still matters: October averages 4.8" and May 3.4". The three wettest months together take 28% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
When it rains in W Thompson Lake, it arrives in quantity
50.1" of precipitation falls across only about 128 wet days here, averaging 0.39 inches each. Fewer days carry more water: the year's total is delivered in comparatively heavy events rather than persistent damp.
- Days with measurable precipitation
- about 128 a year, 35% of all days
- Average depth per wet day
- 0.39 inches
- Most wet days
- May, about 13
- Fewest wet days
- September, about 9
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, and a per-day average is not a forecast of any individual storm.
Winter brings real snow to W Thompson Lake
W Thompson Lake averages 38.5 inches of snowfall a year, with February the snowiest month on the normals, spread across roughly 14 days that record measurable snow. That is depth accumulating on the ground, which is why it can exceed the annual precipitation figure: precipitation counts the liquid the snow melts down to, and fresh snow is mostly air.
- Annual snowfall: 38.5 inches of depth.
- Days recording measurable snow: about 14 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 8% of the year's precipitation.
NOAA 1991-2020 normals. The ten-to-one ratio is a convention, not a measurement: real ratios vary with temperature, so treat the share as an order of magnitude rather than an exact split.
Frost Dates & Growing Season
First Fall Freeze
October 9
50% probability date
Last Spring Freeze
May 1
50% probability date
Growing Season
161 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,582
Higher = more heating needed
Cooling Degree Days
505
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside CT closest to W Thompson Lake on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (48°F here).
- Belle Plaine, IA 48°F · 0.0°F off
- Broadus, MT 48°F · 0.0°F off
- Compton, IL 48°F · 0.0°F off
- Copake, NY 48°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (50.1" here), excluding temperature-peer places.
- Hopewell, VA 50.1" · 0.0" off
- Mineral, CA 50.1" · 0.0" off
- Donegal, PA 50.1" · 0.0" off
- Dunn, NC 50.1" · 0.0" off
Snow and freeze rhythm
When cold and snow define W Thompson Lake
heating led · wet · mid swing
W Thompson Lake's energy balance leans toward cold weather: 6,582 annual heating degree days against 505 for cooling. Its 46.2°F seasonal range still makes the monthly rows more useful than the annual average alone.
W Thompson Lake's frost-free season lasts about 161 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
-
1. W Thompson Lake coldest normal
January
Averaging 25°F (-4°C), this month sits below freezing for the month as a whole, not merely overnight.
-
2. W Thompson Lake typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. W Thompson Lake snow peak
February
W Thompson Lake averages 38.5 inches of snow a year, with February the snowiest month on the normals.
Questions about W Thompson Lake's climate
How much snow does W Thompson Lake get? ▼
How cold does W Thompson Lake get in winter? ▼
How much energy does heating and cooling require in W Thompson Lake? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from W Thompson Lake's primary station: W THOMPSON LAKE (USC00069388). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. No exact Gazetteer row for W Thompson Lake; facility counts that depend on place identity are therefore an upper bound, not a municipal census.
On this page every temperature, precipitation, and derived score for W Thompson Lake comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.