Castleford, ID 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 Castleford's primary NOAA station, CASTLEFORD 2 N.
The climate verdict for Castleford
Dryness leads the climate profile for Castleford, Idaho, with 10.7 inches of precipitation a year. NOAA records an annual average of 48°F. At 52/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 24% of scores.
- 48°F
- yearly average temperature, NOAA normal
- 52/100
- comfort score, above 24% of station-mapped location scores
- 10.7"
- annual precipitation
- 135 days
- frost-free days per growing season
Castleford: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00101551 · Castleford, ID 48°F mean · 10.7" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-ARID · SWING-MID · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 48°F
- RANK-COOL #2,196
- PHOTO-FINISH ≈ Slippery Rock
- PRCP-ARID 10.7"
- SWING-MID 44°F
- COMF-LOW 52/100
- LOAD-HEAT 6,563 HDD
- STN-1 USC00101551
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Slippery Rock, 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 ID station list.
- Castleford (this station) 48°F
- Cold Carmel, NY 48°F
- Hot Waterdale, CO 48°F
- Near Slippery Rock, PA 48°F
- Near Elizabeth, CO 48°F
Climate Living Index · Castleford
Castleford: 26/100 · grade F
Castleford publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Castleford, not an official NOAA rating. Rankings still use Comfort Score 52/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Annual temperature balance | 48.1°F · 19.4° from 67.5°F | 32/100 · F |
| Normal heat + freeze calendar | 170 calendar days | 32/100 · F |
| Frost-free season | 135 days/year | 15/100 · F |
| Precipitation balance | 10.7 in · 24.3 from 35 in | 14/100 · F |
Castleford · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Castleford'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
- 70.8°F
- Coldest month
- 27.2°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 Castleford sits across the climate record
Three NOAA fields for Castleford'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
- Drier than 92%
- Castleford's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- 51st percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How Castleford compares across U.S. station-mapped locations
Castleford's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
52 24th percentile score exceeds 24% 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
Castleford's measured station temperature trend
MethodologyAcross 31 complete annual observations from 1968 to 2018, CASTLEFORD 2 N warmed at a fitted rate of 0.11°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Castleford primary station fitted change +0.11 °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 | 36°F (2°C) | 20°F (-6°C) | 28°F (-2°C) | 1.2" | 28.3 | 0.0 |
| February | 42°F (6°C) | 23°F (-5°C) | 33°F (0°C) | 1.1" | 23.7 | 0.0 |
| March | 53°F (12°C) | 28°F (-2°C) | 41°F (5°C) | 1.0" | 20.2 | 0.0 |
| April | 60°F (16°C) | 33°F (0°C) | 47°F (8°C) | 1.2" | 10.9 | 0.0 |
| May | 70°F (21°C) | 41°F (5°C) | 55°F (13°C) | 1.4" | 2.5 | 0.5 |
| June | 78°F (26°C) | 47°F (8°C) | 63°F (17°C) | 0.8" | 0.1 | 4.2 |
| July | 88°F (31°C) | 54°F (12°C) | 71°F (22°C) | 0.2" | 0.0 | 16.4 |
| August | 86°F (30°C) | 52°F (11°C) | 69°F (21°C) | 0.3" | 0.0 | 11.5 |
| September | 76°F (25°C) | 44°F (7°C) | 60°F (16°C) | 0.5" | 0.5 | 1.2 |
| October | 62°F (17°C) | 35°F (2°C) | 48°F (9°C) | 0.8" | 9.7 | 0.0 |
| November | 47°F (8°C) | 26°F (-4°C) | 36°F (2°C) | 0.9" | 21.6 | 0.0 |
| December | 35°F (2°C) | 19°F (-7°C) | 27°F (-3°C) | 1.3" | 28.2 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 90°F around July 23, short of 90°F on every date, while 170 dates carry a normal low at or below freezing, the coldest 18°F near December 20.
The freezing stretch
The normal low stays at or below 32°F into April 11, then returns to freezing around October 25, covering 170 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.
The widest day
July 19 carries the biggest normal gap between afternoon and dawn, 34°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Castleford.
Where Castleford Stands Nationally
Aridity defines the water calendar: about 11 inches in a normal year lands this among the driest tenth of ranked stations.
Daily temperature swings run wider than most of the country, peaking near 34°F between the normal high and low.
Castleford earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall
Castleford spreads its precipitation across the year
Neither half of the year dominates here: June through August take 12% of the annual total and December through February 33%, with neither reaching the 35% that would mark a distinct wet season. Castleford has no dry season to plan around, though it does carry a 43.6°F seasonal spread.
The gap between the wettest and driest month still matters: May averages 1.4" and July 0.2". The three wettest months together take 37% 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.
Frost Dates & Growing Season
First Fall Freeze
September 29
50% probability date
Last Spring Freeze
May 17
50% probability date
Growing Season
135 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,563
Higher = more heating needed
Cooling Degree Days
434
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside ID closest to Castleford 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).
- Boone, IA 48°F · 0.0°F off
- Concord, NE 48°F · 0.0°F off
- Crofton, NE 48°F · 0.0°F off
- Dowagiac, MI 48°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (10.7" here), excluding temperature-peer places.
- Tulelake, CA 10.7" · 0.0" off
- Joplin, MT 10.8" · 0.0" off
- Boulder, MT 10.8" · 0.1" off
- Alamogordo, NM 10.6" · 0.1" off
Scarce-water calendar
Where Castleford's limited precipitation lands
heating led · dry · mid swing
Castleford's energy balance leans toward cold weather: 6,563 annual heating degree days against 434 for cooling. Its 43.6°F seasonal range still makes the monthly rows more useful than the annual average alone.
Only about 135 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 December mark the typical warm and cold ends of the calendar in Castleford's middle-range seasonal profile. The measured spread is 43.6°F. The annual average is 48°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Castleford's cold-season load does not imply a wet climate. Annual precipitation is 10.7 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.
Castleford wettest normal
May
May concentrates the scarce annual total (10.7 inches).
Castleford driest normal
July
July is typically driest; arid stations are defined by when water is absent, not by a four-season grid.
Questions about Castleford's climate
How dry is Castleford? ▼
How many days above 90°F does Castleford get? ▼
How much energy does heating and cooling require in Castleford? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Castleford's primary station: CASTLEFORD 2 N (USC00101551). 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 1613240). Match rule for Castleford: 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 Castleford 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.