Rockville, 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 Rockville's primary NOAA station, ROCKVILLE.
The climate verdict for Rockville
Water is the standout signal in Rockville, Indiana: 47.4 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 52°F. Its climate comfort score of 64/100 (good) lands mid-pack nationally, exceeding 49% of station-mapped location scores.
- 52°F
- average temperature, NOAA 1991-2020 normal
- 64/100
- comfort score, above 49% of station-mapped location scores
- 47.4"
- annual precipitation · 13" snow
- 165 days
- frost-free days per growing season
Rockville: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00127522 · Rockville, IN 52°F mean · 47.4" precip
TEMP-COOL · RANK-MID · PHOTO-FINISH · PRCP-MID · SWING-WIDE · COMF-MID · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 52°F
- RANK-MID #3,362
- PHOTO-FINISH ≈ Hartford Braina…
- PRCP-MID 47.4"
- SWING-WIDE 47°F
- COMF-MID 64/100
- LOAD-HEAT 5,635 HDD
- STN-1 USC00127522
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Hartford Brainard Fld, CT (+ 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.
- Rockville (this station) 52°F
- Cold Whitestown, IN 52°F
- Hot Huntsville, OH 52°F
- Near Hartford Braina…, CT 52°F
- Near Harrisburg, PA 52°F
Climate Living Index · Rockville
Rockville: 53/100 · grade D
Rockville publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Rockville, not an official NOAA rating. Rankings still use Comfort Score 64/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Snowfall burden | 13.0 inches/year | 59/100 · C |
| Normal heat + freeze calendar | 132 calendar days | 58/100 · C |
| Precipitation balance | 47.4 in · 12.4 from 35 in | 56/100 · C |
| Annual temperature balance | 52.0°F · 15.5° from 67.5°F | 49/100 · D |
| Frost-free season | 165 days/year | 38/100 · F |
Rockville · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Rockville is a continental Köppen climate: Dfa
Coldest-month mean 26.5°F and warmest-month mean 73.9°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
- 73.9°F
- Coldest month
- 26.5°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 Rockville sits across the climate record
Three NOAA fields for Rockville's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 49th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- Top 26% wettest
- Rockville's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- Wider than 70%
- Warmest-to-coldest month gap for Rockville is large versus 6,861 complete station-years.
How Rockville compares across U.S. station-mapped locations
Rockville's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
64 49th percentile score exceeds 49% 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%). This entry sits in this band.
- 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
Rockville's measured station temperature trend
MethodologyAcross 115 complete annual observations from 1891 to 2025, ROCKVILLE warmed at a fitted rate of 0.06°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Rockville primary station fitted change +0.06 °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 | 36°F (2°C) | 17°F (-8°C) | 27°F (-3°C) | 3.4" | 5.1" | 25.4 | 0.0 |
| February | 41°F (5°C) | 21°F (-6°C) | 31°F (-1°C) | 2.6" | 2.8" | 22.0 | 0.0 |
| March | 52°F (11°C) | 29°F (-1°C) | 41°F (5°C) | 3.3" | 1.1" | 16.5 | 0.0 |
| April | 66°F (19°C) | 40°F (4°C) | 53°F (12°C) | 5.0" | 0.1" | 5.2 | 0.0 |
| May | 76°F (24°C) | 50°F (10°C) | 63°F (17°C) | 5.0" | 0.0" | 0.3 | 1.1 |
| June | 84°F (29°C) | 58°F (15°C) | 71°F (22°C) | 5.5" | 0.0" | 0.0 | 6.9 |
| July | 86°F (30°C) | 62°F (17°C) | 74°F (23°C) | 4.7" | 0.0" | 0.0 | 9.6 |
| August | 85°F (29°C) | 60°F (16°C) | 72°F (22°C) | 3.8" | 0.0" | 0.0 | 7.2 |
| September | 79°F (26°C) | 53°F (12°C) | 66°F (19°C) | 3.1" | 0.0" | 0.1 | 3.0 |
| October | 67°F (19°C) | 42°F (5°C) | 54°F (12°C) | 3.9" | 0.0" | 3.6 | 0.1 |
| November | 52°F (11°C) | 31°F (0°C) | 42°F (5°C) | 3.9" | 0.3" | 14.5 | 0.0 |
| December | 40°F (4°C) | 22°F (-5°C) | 31°F (-1°C) | 3.3" | 3.6" | 23.4 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 86°F around July 4, short of 90°F on every date, while 132 dates carry a normal low at or below freezing, the coldest 17°F near January 17.
The freezing stretch
The normal low stays at or below 32°F into March 24, then returns to freezing around November 14, covering 132 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 30, when 36% of years recorded at least a hundredth of an inch. The driest is September 11 at 21%. Summed across the calendar, that is about 102 wet dates a year.
The widest day
September 27 carries the biggest normal gap between afternoon and dawn, 27°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Rockville.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 5.1"
8.0 days with precipitation
Snow: 2.8"
6.5 days with precipitation
Snow: 1.1"
8.0 days with precipitation
Snow: 0.1"
10.3 days with precipitation
11.2 days with precipitation
10.2 days with precipitation
8.5 days with precipitation
7.6 days with precipitation
6.3 days with precipitation
8.3 days with precipitation
Snow: 0.3"
8.2 days with precipitation
Snow: 3.6"
8.5 days with precipitation
Rockville spreads its precipitation across the year
Neither half of the year dominates here: June through August take 29% of the annual total and December through February 19%, with neither reaching the 35% that would mark a distinct wet season. Rockville has no dry season to plan around, though it does carry a wide 47.4°F gap between its warmest and coldest month.
The gap between the wettest and driest month still matters: June averages 5.5" and February 2.6". The three wettest months together take 33% 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 Rockville, it arrives in quantity
47.4" of precipitation falls across only about 102 wet days here, averaging 0.47 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 102 a year, 28% of all days
- Average depth per wet day
- 0.47 inches
- Most wet days
- May, about 11
- Fewest wet days
- September, about 6
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 Rockville
Rockville averages 13.0 inches of snowfall a year, with January the snowiest month on the normals, spread across roughly 7 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: 13.0 inches of depth.
- Days recording measurable snow: about 7 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 12
50% probability date
Last Spring Freeze
April 30
50% probability date
Growing Season
165 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
5,635
Higher = more heating needed
Cooling Degree Days
917
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside IN closest to Rockville 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 (52°F here).
- Arapahoe, CO 52°F · 0.0°F off
- Athens, IL 52°F · 0.0°F off
- Congerville, IL 52°F · 0.0°F off
- Farmington, UT 52°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (47.4" here), excluding temperature-peer places.
- Danbury, NC 47.4" · 0.0" off
- Lead Hill, AR 47.4" · 0.0" off
- Cassville, MO 47.4" · 0.0" off
- Hightstown, NJ 47.5" · 0.0" off
Snow and freeze rhythm
When cold and snow define Rockville
heating led · wet · mid swing
Rockville's energy balance leans toward cold weather: 5,635 annual heating degree days against 917 for cooling. Its 47.4°F seasonal range still makes the monthly rows more useful than the annual average alone.
Rockville's frost-free season lasts about 165 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
-
1. Rockville coldest normal
January
The monthly mean of 27°F (-3°C) sits near freezing, so cold nights and above-freezing afternoons share the same month.
-
2. Rockville typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Rockville snow peak
January
Rockville averages 13.0 inches of snow a year, with January the snowiest month on the normals.
Questions about Rockville's climate
How much snow does Rockville get? ▼
How cold does Rockville get in winter? ▼
How much energy does heating and cooling require in Rockville? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Rockville's primary station: ROCKVILLE (USC00127522). 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 1865520). Match rule for Rockville: 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 Rockville 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.