Delta, UT Climate: Temperature & Rain by Month
Temperature and precipitation from NOAA NCEI 1991–2020 normals →, plus PlainClimate's derived comfort score
30-year climate normals (1991-2020) from Delta's primary NOAA station, DELTA.
The climate verdict for Delta
Dryness leads the climate profile for Delta, Utah, with 8.0 inches of precipitation a year. NOAA records an annual average of 51°F. At 39/100 (below average) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 4% of scores.
- 51°F
- yearly average temperature, NOAA normal
- 39/100
- comfort score, above 4% of station-mapped location scores
- 8.0"
- annual precipitation · 25" snow
- 136 days
- frost-free growing season
Delta: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USW00023162 · Delta, UT 51°F mean · 8.0" precip
TEMP-COOL · RANK-MID · PHOTO-FINISH · PRCP-ARID · SWING-WIDE · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 51°F
- RANK-MID #2,950
- PHOTO-FINISH ≈ Monmouth
- PRCP-ARID 8.0"
- SWING-WIDE 49°F
- COMF-LOW 39/100
- LOAD-HEAT 6,093 HDD
- STN-1 USW00023162
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Monmouth, IL (+ 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 UT station list.
- Delta (this station) 51°F
- Cold Paxton, IL 51°F
- Hot Santaquin Chlor…, UT 51°F
- Near Monmouth, IL 51°F
- Near Gibson City, IL 51°F
Climate Living Index · Delta
Delta: 21/100 · grade F
Delta publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Delta, not an official NOAA rating. Rankings still use Comfort Score 39/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Annual temperature balance | 50.6°F · 16.9° from 67.5°F | 43/100 · D |
| Snowfall burden | 25.3 inches/year | 43/100 · D |
| Frost-free season | 136 days/year | 16/100 · F |
| Precipitation balance | 8.0 in · 27.0 from 35 in | 7/100 · F |
| Normal heat + freeze calendar | 240 calendar days | 0/100 · F |
Delta · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Delta'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
- 76.2°F
- Coldest month
- 27.1°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 Delta sits across the climate record
Three NOAA fields for Delta's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 43rd percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- Drier than 97%
- Delta's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Wider than 78%
- Warmest-to-coldest month gap for Delta is large versus 6,861 complete station-years.
How Delta compares across U.S. station-mapped locations
Delta's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
39 4th percentile score exceeds 4% 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%). This entry sits in this band.
- 40–50: 1,113 station-mapped locations (18%). Above this entry.
- 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
Delta's measured station temperature trend
MethodologyAcross 68 complete annual observations from 1941 to 2025, DELTA warmed at a fitted rate of 0.17°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Delta primary station fitted change +0.17 °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 | 39°F (4°C) | 16°F (-9°C) | 27°F (-3°C) | 0.6" | 5.5" | 30.0 | 0.0 |
| February | 47°F (8°C) | 21°F (-6°C) | 34°F (1°C) | 0.6" | 5.3" | 25.7 | 0.0 |
| March | 58°F (14°C) | 27°F (-3°C) | 43°F (6°C) | 0.8" | 3.9" | 24.9 | 0.0 |
| April | 65°F (18°C) | 33°F (0°C) | 49°F (9°C) | 0.9" | 2.2" | 16.5 | 0.1 |
| May | 76°F (24°C) | 41°F (5°C) | 58°F (15°C) | 0.9" | 0.0" | 4.1 | 2.8 |
| June | 87°F (30°C) | 49°F (10°C) | 68°F (20°C) | 0.5" | 0.0" | 0.3 | 13.3 |
| July | 95°F (35°C) | 57°F (14°C) | 76°F (25°C) | 0.3" | 0.0" | 0.0 | 26.7 |
| August | 93°F (34°C) | 56°F (13°C) | 74°F (23°C) | 0.5" | 0.0" | 0.0 | 24.0 |
| September | 82°F (28°C) | 46°F (8°C) | 64°F (18°C) | 0.7" | 0.0" | 2.0 | 7.1 |
| October | 68°F (20°C) | 33°F (1°C) | 50°F (10°C) | 0.9" | 0.8" | 15.5 | 0.5 |
| November | 51°F (11°C) | 23°F (-5°C) | 37°F (3°C) | 0.5" | 3.2" | 26.8 | 0.0 |
| December | 39°F (4°C) | 15°F (-10°C) | 27°F (-3°C) | 0.6" | 4.4" | 29.9 | 0.0 |
The year, day by day
Delta works both ends of the calendar. Normal highs climb to 97°F by July 25 and hold at or above 90°F on 62 dates, then normal lows drop to freezing or below on 178 dates, bottoming at 14°F around December 25.
When the heat sits
Normal highs reach 90°F from June 26 through August 26, covering 62 dates. The broader mild season, normal highs of 70°F or more, runs May 3 to October 11.
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 14, then returns to freezing around October 20, covering 178 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 February 13, when 21% of years recorded at least a hundredth of an inch. The driest is June 30 at 9%. Summed across the calendar, that is about 60 wet dates a year.
The widest day
July 4 carries the biggest normal gap between afternoon and dawn, 38°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Delta.
Where Delta Stands Nationally
Aridity defines the water calendar: about 8 inches in a normal year lands this among the driest tenth of ranked stations.
Day-to-night contrast is extreme by national standards — the widest normal daily swing reaches about 38°F, sharper than nine in ten ranked stations see.
Delta 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: 5.5"
5.6 days with precipitation
Snow: 5.3"
6.0 days with precipitation
Snow: 3.9"
5.9 days with precipitation
Snow: 2.2"
6.3 days with precipitation
6.1 days with precipitation
3.3 days with precipitation
3.5 days with precipitation
4.5 days with precipitation
4.4 days with precipitation
Snow: 0.8"
4.8 days with precipitation
Snow: 3.2"
4.3 days with precipitation
Snow: 4.4"
5.4 days with precipitation
Delta spreads its precipitation across the year
Neither half of the year dominates here: June through August take 17% of the annual total and December through February 23%, with neither reaching the 35% that would mark a distinct wet season. Delta has no dry season to plan around, though it does carry a wide 49.1°F gap between its warmest and coldest month.
The gap between the wettest and driest month still matters: April averages 0.9" and July 0.3". 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.
Delta is dry, and what does fall arrives gently
Only about 60 days a year record measurable precipitation here, 16% of the calendar, and they carry 8.0" between them. At roughly 0.13 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 April at about 6 wet days; the driest is June 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 Delta
Delta averages 25.3 inches of snowfall a year, with January the snowiest month on the normals, spread across roughly 16 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: 25.3 inches of depth.
- Days recording measurable snow: about 16 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 32% 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 29
50% probability date
Last Spring Freeze
May 16
50% probability date
Growing Season
136 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,093
Higher = more heating needed
Cooling Degree Days
882
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside UT closest to Delta 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 (51°F here).
- Bellefontaine, OH 51°F · 0.0°F off
- Bridgeport, NE 51°F · 0.0°F off
- Brighton, CO 51°F · 0.0°F off
- Detroit, MI 51°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (8.0" here), excluding temperature-peer places.
- Shoshoni, WY 8.0" · 0.0" off
- Arizona City, AZ 8.0" · 0.1" off
- Bloomfield, NM 8.1" · 0.1" off
- Reno, NV 8.1" · 0.1" off
Snow and freeze rhythm
When cold and snow define Delta
heating led · dry · mid swing
Delta's energy balance leans toward cold weather: 6,093 annual heating degree days against 882 for cooling. Its 49.1°F seasonal range still makes the monthly rows more useful than the annual average alone.
Only about 136 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. Delta coldest normal
December
The monthly mean of 27°F (-3°C) sits near freezing, so cold nights and above-freezing afternoons share the same month.
-
2. Delta typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Delta snow peak
January
Delta averages 25.3 inches of snow a year, with January the snowiest month on the normals.
Questions about Delta's climate
How much snow does Delta get? ▼
How many days above 90°F does Delta get? ▼
How much energy does heating and cooling require in Delta? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Delta's primary station: DELTA (USW00023162). 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 4918910). Match rule for Delta: 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 Delta 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.