Callao, UT Climate: Temperature & Rain by Month
Annual temperature and rainfall from NOAA NCEI's 1991–2020 normals →; comfort score computed by PlainClimate
30-year climate normals (1991-2020) from Callao's primary NOAA station, CALLAO.
The climate verdict for Callao
Dryness leads the climate profile for Callao, Utah, with 6.6 inches of precipitation a year. NOAA records an annual average of 49°F. At 44/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 10% of scores.
- 49°F
- average temperature, NOAA 1991-2020 normal
- 44/100
- comfort score, above 10% of station-mapped location scores
- 6.6"
- annual precipitation · 12" snow
- 137 days
- frost-free growing season
Callao: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00421144 · Callao, UT 49°F mean · 6.6" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-ARID · SWING-WIDE · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 49°F
- RANK-COOL #2,539
- PHOTO-FINISH ≈ Newport
- PRCP-ARID 6.6"
- SWING-WIDE 48°F
- COMF-LOW 44/100
- LOAD-HEAT 6,383 HDD
- STN-1 USC00421144
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Newport, MI ( -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 UT station list.
- Callao (this station) 49°F
- Cold Newport, MI 49°F
- Hot Yellowtail Dam, MT 49°F
- Near East Lansing, MI 49°F
- Near Wauseon Wtp, OH 49°F
Climate Living Index · Callao
Callao: 23/100 · grade F
Callao publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Callao, not an official NOAA rating. Rankings still use Comfort Score 44/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Snowfall burden | 12.0 inches/year | 60/100 · C |
| Annual temperature balance | 49.3°F · 18.2° from 67.5°F | 37/100 · F |
| Frost-free season | 137 days/year | 17/100 · F |
| Normal heat + freeze calendar | 212 calendar days | 8/100 · F |
| Precipitation balance | 6.6 in · 28.4 from 35 in | 4/100 · F |
Callao · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Callao'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
- 74.1°F
- Coldest month
- 26.1°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 Callao sits across the climate record
Three NOAA fields for Callao's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 37th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- Drier than 98%
- Callao's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Wider than 73%
- Warmest-to-coldest month gap for Callao is large versus 6,861 complete station-years.
How Callao compares across U.S. station-mapped locations
Callao's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
44 10th percentile score exceeds 10% 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
Callao's measured station temperature trend
MethodologyAcross 47 complete annual observations from 1965 to 2025, CALLAO warmed at a fitted rate of 0.26°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Callao primary station fitted change +0.26 °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 | 38°F (3°C) | 14°F (-10°C) | 26°F (-3°C) | 0.5" | 3.6" | 30.0 | 0.0 |
| February | 45°F (7°C) | 20°F (-6°C) | 33°F (0°C) | 0.4" | 2.2" | 25.9 | 0.0 |
| March | 56°F (13°C) | 27°F (-3°C) | 42°F (5°C) | 0.5" | 0.9" | 22.6 | 0.0 |
| April | 63°F (17°C) | 34°F (1°C) | 48°F (9°C) | 0.8" | 0.6" | 11.9 | 0.0 |
| May | 72°F (22°C) | 42°F (5°C) | 57°F (14°C) | 1.0" | 0.0" | 2.2 | 1.0 |
| June | 82°F (28°C) | 50°F (10°C) | 66°F (19°C) | 0.6" | 0.0" | 0.2 | 8.6 |
| July | 91°F (33°C) | 58°F (14°C) | 74°F (23°C) | 0.4" | 0.0" | 0.0 | 21.8 |
| August | 89°F (32°C) | 55°F (13°C) | 72°F (22°C) | 0.5" | 0.0" | 0.1 | 19.5 |
| September | 79°F (26°C) | 45°F (7°C) | 62°F (17°C) | 0.6" | 0.0" | 1.5 | 3.1 |
| October | 65°F (18°C) | 32°F (0°C) | 49°F (9°C) | 0.7" | 0.0" | 14.6 | 0.0 |
| November | 50°F (10°C) | 22°F (-5°C) | 36°F (2°C) | 0.4" | 1.2" | 26.3 | 0.0 |
| December | 39°F (4°C) | 15°F (-10°C) | 27°F (-3°C) | 0.4" | 3.5" | 29.6 | 0.0 |
The year, day by day
Callao works both ends of the calendar. Normal highs climb to 92°F by July 22 and hold at or above 90°F on 36 dates, then normal lows drop to freezing or below on 176 dates, bottoming at 13°F around January 1.
When the heat sits
Normal highs reach 90°F from July 9 through August 13, covering 36 dates. The broader mild season, normal highs of 70°F or more, runs May 10 to October 5.
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 April 9, then returns to freezing around October 17, covering 176 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 May 8, when 22% of years recorded at least a hundredth of an inch. The driest is June 29 at 10%. Summed across the calendar, that is about 53 wet dates a year.
The widest day
September 6 carries the biggest normal gap between afternoon and dawn, 35°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Callao.
Where Callao Stands Nationally
Aridity defines the water calendar: about 7 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 35°F between the normal high and low.
Callao earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 3.6"
4.8 days with precipitation
Snow: 2.2"
4.0 days with precipitation
Snow: 0.9"
4.5 days with precipitation
Snow: 0.6"
6.2 days with precipitation
7.0 days with precipitation
3.8 days with precipitation
3.9 days with precipitation
4.1 days with precipitation
4.0 days with precipitation
4.1 days with precipitation
Snow: 1.2"
3.2 days with precipitation
Snow: 3.5"
3.7 days with precipitation
Callao spreads its precipitation across the year
Neither half of the year dominates here: June through August take 21% of the annual total and December through February 20%, with neither reaching the 35% that would mark a distinct wet season. Callao has no dry season to plan around, though it does carry a wide 48°F gap between its warmest and coldest month.
The gap between the wettest and driest month still matters: May averages 1.0" and July 0.4". 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.
Callao is dry, and what does fall arrives gently
Only about 53 days a year record measurable precipitation here, 15% of the calendar, and they carry 6.6" between them. At roughly 0.12 inches on an average wet day, this is not the damp drizzle of a marine climate; it is an arid record in which precipitation is both uncommon and light when it appears.
The wettest month by count is May at about 7 wet days; the driest is November at about 3.
A low per-event average in a dry record is a statement about typical days only. Arid regions can still take a large share of a year's total from a single convective storm, which a normal cannot show.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, not the extremes within it.
Winter brings real snow to Callao
Callao averages 12.0 inches of snowfall a year, with January the snowiest month on the normals, spread across roughly 8 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: 12.0 inches of depth.
- Days recording measurable snow: about 8 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 18% 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
September 28
50% probability date
Last Spring Freeze
May 14
50% probability date
Growing Season
137 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,383
Higher = more heating needed
Cooling Degree Days
697
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside UT closest to Callao 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 (49°F here).
- Albion, NY 49°F · 0.0°F off
- Antelope, OR 49°F · 0.0°F off
- Atlantic, IA 49°F · 0.0°F off
- Avon, IL 49°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (6.6" here), excluding temperature-peer places.
- Goodsprings, NV 6.6" · 0.0" off
- Yucca, AZ 6.7" · 0.0" off
- Grand View, ID 6.7" · 0.1" off
- Winslow, AZ 6.5" · 0.1" off
Snow and freeze rhythm
When cold and snow define Callao
heating led · dry · mid swing
Callao's energy balance leans toward cold weather: 6,383 annual heating degree days against 697 for cooling. Its 48.0°F seasonal range still makes the monthly rows more useful than the annual average alone.
Only about 137 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.
-
1. Callao coldest normal
January
The monthly mean of 26°F (-3°C) sits near freezing, so cold nights and above-freezing afternoons share the same month.
-
2. Callao typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Callao snow peak
January
Callao averages 12.0 inches of snow a year, with January the snowiest month on the normals.
Questions about Callao's climate
How much snow does Callao get? ▼
How many days above 90°F does Callao get? ▼
How much energy does heating and cooling require in Callao? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Callao's primary station: CALLAO (USC00421144). 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 Callao; 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 Callao 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.