Williamstown, KY Climate: Temperature & Rain by Month
Average temperature and precipitation from NOAA NCEI 1991–2020 normals →, with a derived climate comfort score
30-year climate normals (1991-2020) from Williamstown's primary NOAA station, WILLIAMSTOWN.
The climate verdict for Williamstown
Water is the standout signal in Williamstown, Kentucky: 45.9 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 56°F. It scores 78/100 for climate comfort (good), putting it in the top third of station-mapped location scores and exceeding 72% of them.
- 56°F
- annual average temperature (NOAA normal)
- 78/100
- comfort score, above 72% of station-mapped location scores
- 45.9"
- annual precipitation · 16" snow
- 201 days
- growing season, frost-free days
Williamstown: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00158714 · Williamstown, KY 56°F mean · 45.9" precip
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-MID · SWING-MID · COMF-TOP · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-MILD 56°F
- RANK-UPPER #4,460
- PHOTO-FINISH ≈ Hawthorne
- PRCP-MID 45.9"
- SWING-MID 43°F
- COMF-TOP 78/100
- LOAD-HEAT 4,392 HDD
- STN-1 USC00158714
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Hawthorne, NV (+ 0.1 °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 KY station list.
- Hot Bremo Bluff, VA 57°F
- Near Hawthorne, NV 57°F
- Williamstown (this station) 56°F
- Cold Huntington Swg…, WV 56°F
- Near Lexington Blueg…, KY 56°F
Climate Living Index · Williamstown
Williamstown: 67/100 · grade C
Williamstown publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Williamstown, not an official NOAA rating. Rankings still use Comfort Score 78/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 92 calendar days | 78/100 · B |
| Frost-free season | 201 days/year | 65/100 · C |
| Annual temperature balance | 56.4°F · 11.1° from 67.5°F | 64/100 · C |
| Precipitation balance | 45.9 in · 10.9 from 35 in | 62/100 · C |
| Snowfall burden | 16.0 inches/year | 54/100 · D |
Williamstown · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Williamstown is a temperate Köppen climate: Cfa
Coldest-month mean 33.4°F and warmest-month mean 76.7°F place this station in temperate, no dry season, hot summer climates (Cfa). Class Cfa is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: temperate, specifically temperate, no dry season, hot summer.
- Köppen code
- Cfa
- Group
- Temperate
- Warmest month
- 76.7°F
- Coldest month
- 33.4°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 Williamstown sits across the climate record
Three NOAA fields for Williamstown's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 65th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- Top 30% wettest
- Williamstown's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- 50th percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How Williamstown compares across U.S. station-mapped locations
Williamstown's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
78 Top 28% score exceeds 72% 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%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). Below this entry.
- 60–70: 1,236 station-mapped locations (20%). Below this entry.
- 70–80: 650 station-mapped locations (11%). This entry sits in this band.
- 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
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 42°F (5°C) | 25°F (-4°C) | 33°F (1°C) | 3.1" | 6.7" | 23.8 | 0.0 |
| February | 47°F (8°C) | 28°F (-2°C) | 38°F (3°C) | 3.3" | 4.1" | 18.9 | 0.0 |
| March | 56°F (13°C) | 35°F (2°C) | 46°F (8°C) | 4.3" | 1.7" | 13.2 | 0.0 |
| April | 68°F (20°C) | 45°F (7°C) | 57°F (14°C) | 4.1" | 0.1" | 3.2 | 0.0 |
| May | 77°F (25°C) | 55°F (13°C) | 66°F (19°C) | 4.9" | 0.0" | 0.1 | 0.1 |
| June | 83°F (29°C) | 63°F (17°C) | 73°F (23°C) | 5.0" | 0.0" | 0.0 | 3.6 |
| July | 87°F (31°C) | 66°F (19°C) | 77°F (25°C) | 3.8" | 0.0" | 0.0 | 8.7 |
| August | 86°F (30°C) | 65°F (18°C) | 76°F (24°C) | 3.8" | 0.0" | 0.0 | 7.9 |
| September | 81°F (27°C) | 58°F (15°C) | 70°F (21°C) | 3.5" | 0.0" | 0.1 | 3.1 |
| October | 70°F (21°C) | 47°F (8°C) | 59°F (15°C) | 3.0" | 0.2" | 1.7 | 0.0 |
| November | 56°F (13°C) | 37°F (3°C) | 47°F (8°C) | 3.5" | 0.4" | 10.5 | 0.0 |
| December | 46°F (8°C) | 29°F (-2°C) | 37°F (3°C) | 3.5" | 2.8" | 19.4 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 87°F around July 12, short of 90°F on every date, while 92 dates carry a normal low at or below freezing, the coldest 24°F near January 20.
The freezing stretch
The normal low stays at or below 32°F into March 3, then returns to freezing around December 3, covering 92 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 December 30, when 48% of years recorded at least a hundredth of an inch. The driest is September 6 at 26%. Summed across the calendar, that is about 142 wet dates a year.
The widest day
October 4 carries the biggest normal gap between afternoon and dawn, 24°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Williamstown.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 6.7"
14.2 days with precipitation
Snow: 4.1"
11.5 days with precipitation
Snow: 1.7"
14.2 days with precipitation
Snow: 0.1"
14.1 days with precipitation
13.5 days with precipitation
11.6 days with precipitation
10.7 days with precipitation
8.6 days with precipitation
8.3 days with precipitation
Snow: 0.2"
9.2 days with precipitation
Snow: 0.4"
11.4 days with precipitation
Snow: 2.8"
14.4 days with precipitation
Williamstown spreads its precipitation across the year
Neither half of the year dominates here: June through August take 27% of the annual total and December through February 22%, with neither reaching the 35% that would mark a distinct wet season. Williamstown has no dry season to plan around, though it does carry a 43.3°F seasonal spread.
The gap between the wettest and driest month still matters: June averages 5.0" and October 3.0". The three wettest months together take 31% 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.
How Williamstown's precipitation splits across the calendar
About 142 days a year record measurable precipitation here, carrying 45.9" between them, or roughly 0.32 inches on a typical wet day. That sits in the middle band: neither the many-light-days pattern of the Pacific Northwest and the Great Lakes, nor the few-heavy-events pattern of the Gulf and the desert Southwest.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year and say nothing about the heaviest single storm on record.
Winter brings real snow to Williamstown
Williamstown averages 16.0 inches of snowfall a year, with January the snowiest month on the normals, spread across roughly 15 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: 16.0 inches of depth.
- Days recording measurable snow: about 15 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 3% 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 29
50% probability date
Last Spring Freeze
April 11
50% probability date
Growing Season
201 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
4,392
Higher = more heating needed
Cooling Degree Days
1,276
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside KY closest to Williamstown 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 (56°F here).
- Appomattox, VA 56°F · 0.0°F off
- Boise City, OK 56°F · 0.0°F off
- Dalhart, TX 56°F · 0.0°F off
- Hudson, KS 56°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (45.9" here), excluding temperature-peer places.
- Lebanon, MO 45.9" · 0.0" off
- Salem, IL 45.9" · 0.0" off
- Siler City, NC 45.9" · 0.0" off
- Colfax, CA 45.9" · 0.0" off
Snow and freeze rhythm
When cold and snow define Williamstown
heating led · wet · mid swing
Williamstown's energy balance leans toward cold weather: 4,392 annual heating degree days against 1,276 for cooling. Its 43.3°F seasonal range still makes the monthly rows more useful than the annual average alone.
Williamstown's frost-free season lasts about 201 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
-
1. Williamstown coldest normal
January
The monthly mean of 33°F (1°C) sits near freezing, so cold nights and above-freezing afternoons share the same month.
-
2. Williamstown typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Williamstown snow peak
January
Williamstown averages 16.0 inches of snow a year, with January the snowiest month on the normals.
Questions about Williamstown's climate
How much snow does Williamstown get? ▼
How cold does Williamstown get in winter? ▼
How much energy does heating and cooling require in Williamstown? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Williamstown's primary station: WILLIAMSTOWN (USC00158714). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as an incorporated place (GEOID 2183406). Match rule for Williamstown: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Williamstown 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.