Rochelle, WY Climate: Temperature & Rain by Month
Explore NOAA NCEI's 1991–2020 climate normals → and a clearly labeled PlainClimate comfort calculation
30-year climate normals (1991-2020) from Rochelle's primary NOAA station, ROCHELLE 7ENE.
The climate verdict for Rochelle
Dryness leads the climate profile for Rochelle, Wyoming, with 14.6 inches of precipitation a year. NOAA records an annual average of 44°F. At 40/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 6% of scores.
- 44°F
- average temperature, NOAA 1991-2020 normal
- 40/100
- comfort score, above 6% of station-mapped location scores
- 14.6"
- precipitation, annual total
- 112 days
- frost-free days per growing season
Rochelle: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00487810 · Rochelle, WY 44°F mean · 14.6" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-DRY · SWING-WIDE · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 44°F
- RANK-COOL #1,029
- PHOTO-FINISH ≈ Mather
- PRCP-DRY 14.6"
- SWING-WIDE 50°F
- COMF-LOW 40/100
- LOAD-HEAT 8,082 HDD
- STN-1 USC00487810
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Mather, WI (+ 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 WY station list.
- Rochelle (this station) 44°F
- Hot Ludlow, SD 44°F
- Near Mather, WI 44°F
- Near Shawano, WI 44°F
- Near Valentine, MT 44°F
Rochelle sits in Wyoming, the #5 coldest U.S. state at 43.3°F statewide annual average - see all 50 coldest states ranked by NOAA normals
Climate Living Index · Rochelle
Rochelle: 11/100 · grade F
Rochelle publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Rochelle, not an official NOAA rating. Rankings still use Comfort Score 40/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 14.6 in · 20.4 from 35 in | 27/100 · F |
| Annual temperature balance | 43.9°F · 23.6° from 67.5°F | 16/100 · F |
| Frost-free season | 112 days/year | 3/100 · F |
| Normal heat + freeze calendar | 240 calendar days | 0/100 · F |
Rochelle · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Rochelle's normals sit in a dry climate class: BSk
Precipitation is low relative to temperature but above true desert thresholds: cold semi-arid steppe (BSk). Class BSk is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: dry (arid or semi-arid), specifically cold semi-arid steppe.
- Köppen code
- BSk
- Group
- Dry (arid or semi-arid)
- Warmest month
- 71.3°F
- Coldest month
- 21.1°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 Rochelle sits across the climate record
Three NOAA fields for Rochelle's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 85%
- Among 6,861 stations, Rochelle sits in the cooler third of annual means.
- Annual precipitation
- Drier than 84%
- Rochelle's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Wider than 81%
- Warmest-to-coldest month gap for Rochelle is large versus 6,861 complete station-years.
How Rochelle compares across U.S. station-mapped locations
Rochelle's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
40 6th percentile score exceeds 6% 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
Rochelle's measured station temperature trend
MethodologyAcross 45 complete annual observations from 1953 to 2025, ROCHELLE 7ENE warmed at a fitted rate of 0.21°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Rochelle primary station fitted change +0.21 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 34°F (1°C) | 8°F (-13°C) | 21°F (-6°C) | 0.3" | 30.8 | 0.0 |
| February | 37°F (3°C) | 10°F (-12°C) | 24°F (-5°C) | 0.5" | 27.6 | 0.0 |
| March | 47°F (9°C) | 18°F (-8°C) | 33°F (0°C) | 0.8" | 28.6 | 0.0 |
| April | 57°F (14°C) | 26°F (-3°C) | 42°F (5°C) | 2.0" | 21.9 | 0.1 |
| May | 66°F (19°C) | 37°F (3°C) | 51°F (11°C) | 2.5" | 7.0 | 0.1 |
| June | 78°F (26°C) | 46°F (8°C) | 62°F (17°C) | 2.4" | 0.8 | 3.2 |
| July | 90°F (32°C) | 53°F (12°C) | 71°F (22°C) | 2.5" | 0.1 | 13.1 |
| August | 88°F (31°C) | 50°F (10°C) | 69°F (21°C) | 1.0" | 0.1 | 14.4 |
| September | 77°F (25°C) | 39°F (4°C) | 58°F (15°C) | 0.8" | 5.8 | 3.9 |
| October | 62°F (17°C) | 27°F (-3°C) | 44°F (7°C) | 1.1" | 21.9 | 0.2 |
| November | 46°F (8°C) | 16°F (-9°C) | 31°F (-1°C) | 0.4" | 28.9 | 0.0 |
| December | 35°F (1°C) | 9°F (-13°C) | 22°F (-6°C) | 0.3" | 30.7 | 0.0 |
The year, day by day
Rochelle works both ends of the calendar. Normal highs climb to 92°F by July 24 and hold at or above 90°F on 27 dates, then normal lows drop to freezing or below on 213 dates, bottoming at 7°F around January 1.
When the heat sits
Normal highs reach 90°F from July 13 through August 8, covering 27 dates. The broader mild season, normal highs of 70°F or more, runs May 29 to September 30.
This counts calendar dates whose 1991–2020 normal high reaches 90°F. It is a smaller number than the 90°F+ day counts in the monthly table above, which measure how often the threshold was actually crossed in a typical year. A date can average 88°F and still exceed 90°F in half of all years.
The freezing stretch
The normal low stays at or below 32°F into May 3, then returns to freezing around October 4, covering 213 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 June 1, when 31% of years recorded at least a hundredth of an inch. The driest is December 8 at 12%. Summed across the calendar, that is about 69 wet dates a year.
The widest day
September 3 carries the biggest normal gap between afternoon and dawn, 39°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Rochelle.
Where Rochelle Stands Nationally
Winters bite deep and often: the normal nightly low dips to freezing or below on around 213 nights a year, placing this among the most frost-prone tenth of ranked stations.
Day-to-night contrast is extreme by national standards — the widest normal daily swing reaches about 39°F, sharper than nine in ten ranked stations see.
Rochelle earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall
4.3 days with precipitation
4.5 days with precipitation
5.3 days with precipitation
8.2 days with precipitation
8.6 days with precipitation
8.8 days with precipitation
7.1 days with precipitation
4.6 days with precipitation
4.0 days with precipitation
4.9 days with precipitation
4.2 days with precipitation
3.7 days with precipitation
Rochelle runs a summer-peaked wet season
41% of Rochelle's yearly precipitation falls in June, July and August alone, against the 25% an evenly spread year would give those three months. The wettest month is July at 2.5", on a wide 50.2°F gap between its warmest and coldest month. Warm-season convection and, across the Southwest, the North American monsoon produce this shape: rain arrives in short heavy bursts during the hottest part of the year rather than as long cool-season soaking.
- Wettest three months: July, May, June, taking 51% of the annual total between them.
- Driest month: December at 0.3".
- Winter share: 7% falls in December, January and February.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. A summer-peaked label means the June-August share reaches 35%; it describes timing across an average year, not any single season, and says nothing about how heavy an individual storm can be.
How Rochelle's precipitation splits across the calendar
About 68 days a year record measurable precipitation here, carrying 14.6" between them, or roughly 0.21 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.
Frost Dates & Growing Season
First Fall Freeze
September 14
50% probability date
Last Spring Freeze
May 25
50% probability date
Growing Season
112 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
8,082
Higher = more heating needed
Cooling Degree Days
434
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside WY closest to Rochelle 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 (44°F here).
- Bethel, ME 44°F · 0.0°F off
- Carter, MT 44°F · 0.0°F off
- Colton, NY 44°F · 0.0°F off
- Del Norte, CO 44°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (14.6" here), excluding temperature-peer places.
- Livermore, CA 14.6" · 0.0" off
- Nogales, AZ 14.6" · 0.0" off
- Newkirk, NM 14.6" · 0.0" off
- Ramona, CA 14.7" · 0.0" off
Scarce-water calendar
Where Rochelle's limited precipitation lands
heating led · dry · mid swing
Rochelle's energy balance leans toward cold weather: 8,082 annual heating degree days against 434 for cooling. Its 50.2°F seasonal range still makes the monthly rows more useful than the annual average alone.
Only about 112 days are frost-free in a normal year. That short interval is consistent with the cold-season signal, but the measure does not predict the exact first or last freeze in any one year.
July and January mark the typical warm and cold ends of the calendar in Rochelle's middle-range seasonal profile. The measured spread is 50.2°F. The annual average is 44°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Rochelle's cold-season load does not imply a wet climate. Annual precipitation is 14.6 inches, which places the station in PlainClimate's dry range. Snowfall is not added to the interpretation because its annual value is missing. The snowfall and rainfall fields should be read separately rather than inferred from temperature.
Rochelle wettest normal
July
July concentrates the scarce annual total (14.6 inches).
Rochelle driest normal
December
December is typically driest; arid stations are defined by when water is absent, not by a four-season grid.
Questions about Rochelle's climate
How dry is Rochelle? ▼
How many days above 90°F does Rochelle get? ▼
How much energy does heating and cooling require in Rochelle? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Rochelle's primary station: ROCHELLE 7ENE (USC00487810). 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 Rochelle; 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 Rochelle 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.