Bluffton, IN 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 Bluffton's primary NOAA station, BLUFFTON 6N.
The climate verdict for Bluffton
Bluffton, Indiana has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 50°F. Its climate comfort score of 59/100 (moderate) lands mid-pack nationally, exceeding 37% of station-mapped location scores.
- 50°F
- average temperature, NOAA 1991-2020 normal
- 59/100
- comfort score, above 37% of station-mapped location scores
- 40.0"
- annual precipitation · 23" snow
- 179 days
- frost-free growing season
Bluffton: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00120830 · Bluffton, IN 50°F mean · 40.0" precip
TEMP-COOL · RANK-MID · PHOTO-FINISH · PRCP-MID · SWING-WIDE · COMF-MID · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 50°F
- RANK-MID #2,744
- PHOTO-FINISH ≈ Jerome
- PRCP-MID 40.0"
- SWING-WIDE 49°F
- COMF-MID 59/100
- LOAD-HEAT 6,184 HDD
- STN-1 USC00120830
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Jerome, ID (+ 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 IN station list.
- Bluffton (this station) 50°F
- Hot Akron Washingto…, CO 50°F
- Near Jerome, ID 50°F
- Near Hicksville, OH 50°F
- Near Indiana Dunes NL, IN 50°F
Climate Living Index · Bluffton
Bluffton: 54/100 · grade D
Bluffton publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Bluffton, not an official NOAA rating. Rankings still use Comfort Score 59/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 40.0 in · 5.0 from 35 in | 82/100 · B |
| Normal heat + freeze calendar | 134 calendar days | 56/100 · C |
| Frost-free season | 179 days/year | 49/100 · D |
| Snowfall burden | 23.3 inches/year | 45/100 · D |
| Annual temperature balance | 50.1°F · 17.4° from 67.5°F | 41/100 · D |
Bluffton · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Bluffton is a continental Köppen climate: Dfa
Coldest-month mean 24.5°F and warmest-month mean 73.0°F place this station in continental, no dry season, hot summer climates (Dfa). Class Dfa is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: continental, specifically continental, no dry season, hot summer.
- Köppen code
- Dfa
- Group
- Continental
- Warmest month
- 73.0°F
- Coldest month
- 24.5°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 Bluffton sits across the climate record
Three NOAA fields for Bluffton's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 40th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- 58th percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Wider than 75%
- Warmest-to-coldest month gap for Bluffton is large versus 6,861 complete station-years.
How Bluffton compares across U.S. station-mapped locations
Bluffton's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
59 37th percentile score exceeds 37% 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%). This entry sits in this band.
- 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
Bluffton's measured station temperature trend
MethodologyAcross 30 complete annual observations from 1972 to 2017, BLUFFTON 6N warmed at a fitted rate of 0.30°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Bluffton primary station fitted change +0.30 °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 | 32°F (0°C) | 17°F (-8°C) | 25°F (-4°C) | 2.5" | 7.6" | 27.7 | 0.0 |
| February | 36°F (2°C) | 19°F (-7°C) | 27°F (-3°C) | 2.0" | 6.5" | 24.6 | 0.0 |
| March | 47°F (8°C) | 28°F (-2°C) | 37°F (3°C) | 2.6" | 3.6" | 21.5 | 0.0 |
| April | 60°F (16°C) | 39°F (4°C) | 49°F (10°C) | 3.8" | 0.4" | 6.7 | 0.0 |
| May | 71°F (22°C) | 51°F (10°C) | 61°F (16°C) | 4.7" | 0.0" | 0.3 | 0.5 |
| June | 80°F (26°C) | 60°F (16°C) | 70°F (21°C) | 4.7" | 0.0" | 0.0 | 3.3 |
| July | 83°F (28°C) | 63°F (17°C) | 73°F (23°C) | 4.5" | 0.0" | 0.0 | 4.2 |
| August | 81°F (27°C) | 61°F (16°C) | 71°F (22°C) | 3.8" | 0.0" | 0.0 | 2.6 |
| September | 76°F (24°C) | 54°F (12°C) | 65°F (18°C) | 3.1" | 0.0" | 0.1 | 1.6 |
| October | 63°F (17°C) | 42°F (6°C) | 53°F (12°C) | 2.9" | 0.0" | 3.5 | 0.1 |
| November | 49°F (9°C) | 32°F (0°C) | 41°F (5°C) | 3.1" | 1.1" | 16.1 | 0.0 |
| December | 37°F (3°C) | 23°F (-5°C) | 30°F (-1°C) | 2.3" | 4.1" | 25.5 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 83°F around July 8, short of 90°F on every date, while 134 dates carry a normal low at or below freezing, the coldest 16°F near January 25.
The freezing stretch
The normal low stays at or below 32°F into March 28, then returns to freezing around November 16, covering 134 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 April 28, when 44% of years recorded at least a hundredth of an inch. The driest is September 3 at 27%. Summed across the calendar, that is about 134 wet dates a year.
The widest day
September 24 carries the biggest normal gap between afternoon and dawn, 23°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Bluffton.
Where Bluffton Stands Nationally
Days and nights track unusually close together; the widest normal swing, about 23°F, is narrower than most stations record.
Bluffton 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: 7.6"
12.8 days with precipitation
Snow: 6.5"
10.7 days with precipitation
Snow: 3.6"
11.3 days with precipitation
Snow: 0.4"
13.1 days with precipitation
13.3 days with precipitation
11.6 days with precipitation
9.5 days with precipitation
9.2 days with precipitation
8.1 days with precipitation
10.4 days with precipitation
Snow: 1.1"
10.8 days with precipitation
Snow: 4.1"
12.6 days with precipitation
Bluffton spreads its precipitation across the year
Neither half of the year dominates here: June through August take 33% of the annual total and December through February 17%, with neither reaching the 35% that would mark a distinct wet season. Bluffton has no dry season to plan around, though it does carry a wide 48.5°F gap between its warmest and coldest month.
The gap between the wettest and driest month still matters: June averages 4.7" and February 2.0". The three wettest months together take 35% 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 Bluffton's precipitation splits across the calendar
About 133 days a year record measurable precipitation here, carrying 40.0" between them, or roughly 0.30 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 Bluffton
Bluffton averages 23.3 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: 23.3 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 6% 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 20
50% probability date
Last Spring Freeze
April 24
50% probability date
Growing Season
179 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,184
Higher = more heating needed
Cooling Degree Days
798
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside IN closest to Bluffton 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 (50°F here).
- Akron, CO 50°F · 0.0°F off
- Ansonia, CT 50°F · 0.0°F off
- Austin, NV 50°F · 0.0°F off
- Banner Elk, NC 50°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (40.0" here), excluding temperature-peer places.
- Polo, IL 40.0" · 0.0" off
- Salisbury, MO 40.0" · 0.0" off
- Carlinville, IL 40.0" · 0.0" off
- Pulaski, VA 40.0" · 0.0" off
Snow and freeze rhythm
When cold and snow define Bluffton
heating led · moderate · mid swing
Bluffton's energy balance leans toward cold weather: 6,184 annual heating degree days against 798 for cooling. Its 48.5°F seasonal range still makes the monthly rows more useful than the annual average alone.
Bluffton's frost-free season lasts about 179 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
-
1. Bluffton coldest normal
January
Averaging 25°F (-4°C), this month sits below freezing for the month as a whole, not merely overnight.
-
2. Bluffton typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Bluffton snow peak
January
Bluffton averages 23.3 inches of snow a year, with January the snowiest month on the normals.
Questions about Bluffton's climate
How much snow does Bluffton get? ▼
How cold does Bluffton get in winter? ▼
How much energy does heating and cooling require in Bluffton? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Bluffton's primary station: BLUFFTON 6N (USC00120830). 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 1806220). Match rule for Bluffton: 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 Bluffton 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.