McNary, AZ 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 McNary's primary NOAA station, MC NARY 2N.
The climate verdict for McNary
McNary, Arizona has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 49°F. At 54/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 31% of scores.
- 49°F
- annual average temperature (NOAA normal)
- 54/100
- comfort score, above 31% of station-mapped location scores
- 24.1"
- annual precipitation · 66" snow
- 144 days
- frost-free days per growing season
McNary: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00025412 · McNary, AZ 49°F mean · 24.1" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-DRY · SWING-MID · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 49°F
- RANK-COOL #2,333
- PHOTO-FINISH ≈ Scotts Mills
- PRCP-DRY 24.1"
- SWING-MID 33°F
- COMF-LOW 54/100
- LOAD-HEAT 6,113 HDD
- STN-1 USC00025412
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Scotts Mills, OR (+ 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 AZ station list.
- McNary (this station) 49°F
- Hot Newfound Gap, TN 49°F
- Near Scotts Mills, OR 49°F
- Cold Luna Ranger Sta…, NM 48°F
- Near SO Entrance Yos…, CA 48°F
Climate Living Index · McNary
McNary: 32/100 · grade F
McNary publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for McNary, not an official NOAA rating. Rankings still use Comfort Score 54/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 24.1 in · 10.9 from 35 in | 62/100 · C |
| Annual temperature balance | 48.6°F · 18.9° from 67.5°F | 34/100 · F |
| Normal heat + freeze calendar | 179 calendar days | 26/100 · F |
| Frost-free season | 144 days/year | 21/100 · F |
| Snowfall burden | 66.0 inches/year | 12/100 · F |
McNary · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
McNary is a temperate Köppen climate: Csb
Coldest-month mean 32.6°F and warmest-month mean 66.0°F place this station in temperate, dry-summer, warm summer climates (Csb). Class Csb is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: temperate, specifically temperate, dry-summer, warm summer.
- Köppen code
- Csb
- Group
- Temperate
- Warmest month
- 66.0°F
- Coldest month
- 32.6°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 McNary sits across the climate record
Three NOAA fields for McNary's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 34th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- 33rd percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Narrower than 85%
- Warmest-to-coldest month gap for McNary is compact versus 6,861 complete station-years.
How McNary compares across U.S. station-mapped locations
McNary's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
54 31st percentile score exceeds 31% 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
McNary's measured station temperature trend
MethodologyAcross 72 complete annual observations from 1934 to 2025, MC NARY 2N warmed at a fitted rate of 0.12°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- McNary 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 | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 45°F (7°C) | 21°F (-6°C) | 33°F (0°C) | 2.1" | 14.8" | 30.0 | 0.0 |
| February | 47°F (8°C) | 23°F (-5°C) | 35°F (2°C) | 2.0" | 13.9" | 27.1 | 0.0 |
| March | 53°F (12°C) | 27°F (-3°C) | 40°F (5°C) | 1.8" | 11.9" | 26.9 | 0.0 |
| April | 60°F (15°C) | 30°F (-1°C) | 45°F (7°C) | 0.9" | 4.7" | 18.9 | 0.0 |
| May | 69°F (21°C) | 38°F (3°C) | 53°F (12°C) | 0.7" | 0.6" | 5.4 | 0.0 |
| June | 80°F (27°C) | 47°F (8°C) | 63°F (17°C) | 0.5" | 0.0" | 0.2 | 1.1 |
| July | 80°F (27°C) | 52°F (11°C) | 66°F (19°C) | 3.7" | 0.0" | 0.0 | 1.3 |
| August | 77°F (25°C) | 52°F (11°C) | 64°F (18°C) | 4.6" | 0.0" | 0.0 | 0.1 |
| September | 73°F (23°C) | 46°F (8°C) | 60°F (15°C) | 2.2" | 0.0" | 0.4 | 0.0 |
| October | 64°F (18°C) | 36°F (2°C) | 50°F (10°C) | 1.7" | 2.1" | 8.3 | 0.0 |
| November | 54°F (12°C) | 28°F (-2°C) | 41°F (5°C) | 1.6" | 5.2" | 23.5 | 0.0 |
| December | 45°F (7°C) | 21°F (-6°C) | 33°F (0°C) | 2.3" | 12.8" | 29.7 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 82°F around June 26, short of 90°F on every date, while 179 dates carry a normal low at or below freezing, the coldest 20°F near December 26.
The freezing stretch
The normal low stays at or below 32°F into April 26, then returns to freezing around October 31, covering 179 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 August 2, when 56% of years recorded at least a hundredth of an inch. The driest is June 4 at 11%. Summed across the calendar, that is about 97 wet dates a year.
The widest day
June 11 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 McNary.
Where McNary Stands Nationally
Freezing is routine here by normals standards — the normal low reaches 32°F or colder on about 179 nights a year, more than most ranked stations.
Daily temperature swings run wider than most of the country, peaking near 34°F between the normal high and low.
McNary 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: 14.8"
7.9 days with precipitation
Snow: 13.9"
7.4 days with precipitation
Snow: 11.9"
7.7 days with precipitation
Snow: 4.7"
5.0 days with precipitation
Snow: 0.6"
4.6 days with precipitation
3.5 days with precipitation
15.2 days with precipitation
16.7 days with precipitation
9.8 days with precipitation
Snow: 2.1"
5.9 days with precipitation
Snow: 5.2"
5.2 days with precipitation
Snow: 12.8"
7.7 days with precipitation
McNary runs a summer-peaked wet season
37% of McNary'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 August at 4.6", on a 33.4°F seasonal spread. 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: August, July, December, taking 44% of the annual total between them.
- Driest month: June at 0.5".
- Winter share: 26% 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 McNary's precipitation splits across the calendar
About 97 days a year record measurable precipitation here, carrying 24.1" between them, or roughly 0.25 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.
Winter brings real snow to McNary
McNary averages 66.0 inches of snowfall a year, with January the snowiest month on the normals, spread across roughly 30 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: 66.0 inches of depth.
- Days recording measurable snow: about 30 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 27% 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 11
50% probability date
Last Spring Freeze
May 20
50% probability date
Growing Season
144 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,113
Higher = more heating needed
Cooling Degree Days
138
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside AZ closest to McNary 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).
- Antioch, IL 49°F · 0.0°F off
- Baker, NV 49°F · 0.0°F off
- Blissfield, MI 49°F · 0.0°F off
- Bloomingdale, MI 49°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (24.1" here), excluding temperature-peer places.
- Alexandria, MN 24.1" · 0.0" off
- Gothenburg, NE 24.1" · 0.0" off
- Chamberlain, SD 24.1" · 0.0" off
- Conde, SD 24.1" · 0.0" off
Snow and freeze rhythm
When cold and snow define McNary
heating led · moderate · mid swing
McNary's energy balance leans toward cold weather: 6,113 annual heating degree days against 138 for cooling. Its 33.4°F seasonal range still makes the monthly rows more useful than the annual average alone.
Only about 144 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. McNary coldest normal
January
The monthly mean of 33°F (0°C) sits near freezing, so cold nights and above-freezing afternoons share the same month.
-
2. McNary typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. McNary snow peak
January
McNary averages 66.0 inches of snow a year, with January the snowiest month on the normals.
Questions about McNary's climate
How much snow does McNary get? ▼
How cold does McNary get in winter? ▼
How much energy does heating and cooling require in McNary? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from McNary's primary station: MC NARY 2N (USC00025412). 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 a census-designated place (GEOID 0443430), not an incorporated municipality. Match rule for McNary: 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 McNary 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.