Nogales, Arizona climate: Normal weather by month, frost dates and records
Nogales's normal year runs from 34°F December nights to 94°F July afternoons, with 14.6 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 18.2°C, December lows of 1°C, July highs of 35°C, 371 mm of precipitation a year.
- NOAA stationNogales International Airport
- Station IDUSW00003196
- Location31.42°N 110.85°W
- Elevation3,932 ft (1,199 m)
- Population19,965
On October 24, the normal high in Nogales is 81°F and the normal low 47°F, and the chance of measurable rain or snow is 9%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Nogales.
- Jan 66° 34°
- Feb 68° 36°
- Mar 73° 40°
- Apr 79° 44°
- May 88° 52°
- Jun 97° 62°
- Jul 94° 67°
- Aug 92° 66°
- Sep 90° 61°
- Oct 83° 50°
- Nov 73° 40°
- Dec 65° 34°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Nogales each month?
July is the warmest month, with normal highs of 94°F; December the coldest, with normal lows of 34°F. The most precipitation falls in July (4.18 in), the least in May (0.15 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 66°F | 34°F | 50.0°F | 0.84 | 4 | <1 | 14 | 10 h 20 min |
| February | 68°F | 36°F | 51.7°F | 0.78 | 4 | <1 | 9 | 11 h |
| March | 73°F | 40°F | 56.8°F | 0.63 | 3 | <1 | 4 | 12 h |
| April | 79°F | 44°F | 61.9°F | 0.28 | 2 | 2 | <1 | 12 h 50 min |
| May | 88°F | 52°F | 69.9°F | 0.15 | 1 | 13 | <1 | 13 h 40 min |
| June | 97°F | 62°F | 79.6°F | 0.54 | 3 | 27 | <1 | 14 h 10 min |
| July | 94°F | 67°F | 80.5°F | 4.18 | 15 | 24 | <1 | 14 h |
| August | 92°F | 66°F | 78.9°F | 3.41 | 14 | 21 | <1 | 13 h 20 min |
| September | 90°F | 61°F | 75.4°F | 1.53 | 7 | 17 | <1 | 12 h 20 min |
| October | 83°F | 50°F | 66.3°F | 0.65 | 3 | 6 | <1 | 11 h 30 min |
| November | 73°F | 40°F | 56.7°F | 0.62 | 3 | <1 | 4 | 10 h 40 min |
| December | 65°F | 34°F | 49.4°F | 1.01 | 4 | <1 | 14 | 10 h 10 min |
| Year (annual) | 81°F | 49°F | 64.8°F | 14.62 | 63 | 110 | 45 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 19°C | 1°C | 10.0°C | 21 mm |
| February | 20°C | 2°C | 10.9°C | 20 mm |
| March | 23°C | 5°C | 13.8°C | 16 mm |
| April | 26°C | 7°C | 16.6°C | 7 mm |
| May | 31°C | 11°C | 21.1°C | 4 mm |
| June | 36°C | 17°C | 26.4°C | 14 mm |
| July | 35°C | 19°C | 26.9°C | 106 mm |
| August | 33°C | 19°C | 26.1°C | 87 mm |
| September | 32°C | 16°C | 24.1°C | 39 mm |
| October | 28°C | 10°C | 19.1°C | 17 mm |
| November | 23°C | 5°C | 13.7°C | 16 mm |
| December | 18°C | 1°C | 9.7°C | 26 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Rio Rico (8 miles away), gets 0 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00003196; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Nogales?
Normal highs sit between 65°F and 85°F in January, February, March, April, October and November. Of those, April has the fewest days with rain (2).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00003196.
When is the last frost in Nogales?
In Nogales, the last spring frost (32°F) comes after March 20 in half of years and after April 13 in one year in ten; the first autumn frost comes before November 17 in half of years and before October 30 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- March 201 year in 10 after April 13; 9 in 10 after February 24
- First autumn frost, half of years before
- November 171 year in 10 before October 30; 9 in 10 before December 3
NOAA puts the median frost-free season at 239 days, and the season without a hard freeze (28°F) at 279 days.
A hard freeze (28°F) comes after February 23 in half of springs and before November 30 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Nogales in zone 8b in ZIP code 85621, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Nogales's NOAA station is in zone 8b: the coldest night of a typical year reaches 18°F (21 complete years).
Frost dates for every NOAA station in Arizona · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USW00003196; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Nogales?
In a normal year in Nogales, 110 days a year reach 90°F (19 of them 100°F or more), 45 nights fall to 32°F or colder and 63 days bring measurable precipitation.
- Days at 90°F or more
- 110a normal year
- Days at 100°F or more
- 19a normal year
- Nights at 32°F or colder
- 45a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 63a normal year
The highest temperature in this station's record (since 1999) is 112°F, on June 19, 2017; the lowest is 10°F, on January 15, 2013.
The wettest calendar year on that record is 2000, with 21.82 in.
Source: NOAA NCEI 1991-2020 annual normals, station USW00003196; records: ACIS (NOAA Regional Climate Centers), station USW00003196. Records use complete months only; a month missing more than three days is left out.
How sunny is Nogales?
Over a year 89% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Nogales, 5.8 kWh per square metre a day. May is the sunniest month (94%) and July the cloudiest (79%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 87% | 3.8 |
| February | 87% | 4.7 |
| March | 90% | 6.2 |
| April | 94% | 7.6 |
| May | 94% | 8.3 |
| June | 92% | 8.1 |
| July | 79% | 6.5 |
| August | 83% | 6.3 |
| September | 87% | 5.8 |
| October | 92% | 5.2 |
| November | 90% | 4.1 |
| December | 87% | 3.5 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Nogales need?
A normal year in Nogales brings 2,039 heating degree days, 62% fewer than the median U.S. place (5,373), and 1,977 cooling degree days, 2.2 times the median (908). Three months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 5,666 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 467 | 0 |
| February | 372 | 1 |
| March | 260 | 5 |
| April | 120 | 27 |
| May | 25 | 177 |
| June | 0 | 439 |
| July | 0 | 481 |
| August | 0 | 431 |
| September | 1 | 313 |
| October | 55 | 95 |
| November | 257 | 8 |
| December | 484 | 0 |
| Year (annual) | 2,039 | 1,977 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00003196. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Nogales been warmer than normal lately?
2025 averaged 66.6°F, 1.8°F above the 1991-2020 normal of 64.8°F. 4 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 65.5°F | +0.7°F | 14.48 |
| 2022 | 64.6°F | −0.2°F | 19.08 |
| 2023 | 65.7°F | +0.9°F | 8.76 |
| 2024 | 66.1°F | +1.3°F | – |
| 2025 | 66.6°F | +1.8°F | 14.88 |
Source: observed years: ACIS, station USW00003196. A year counts only with all twelve months complete.
How does Nogales's climate compare?
Nogales is warmer than 49 of the other 96 places with their own NOAA record in Arizona, and wetter than 64. Across the 7,247 U.S. stations with normals, its annual mean of 64.8°F is warmer than 87%.
In the Köppen classification computed from these normals, Nogales is BSh: hot semi-arid steppe. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Nogales share this climate record?
3 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Patagonia, AZ796 people · 10 mi NE
- Kino Springs, AZ143 people · 4 mi SE
- Beyerville, AZ61 people · 3 mi SW
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Nogales's climate
What is the coldest month in Nogales?
December, with a normal high of 65°F and a normal low of 34°F. The warmest is July (94°F by day, 67°F at night).
Does it snow in Nogales?
Rarely. NOAA publishes no 1991-2020 snowfall normal for Nogales's NOAA station; the nearest record that keeps one, Rio Rico (8 miles away), records 0 inches of snow in a normal year.
What is the rainiest month in Nogales?
July, with 4.18 in of precipitation in a normal year; the driest is May with 0.15 in.
What plant hardiness zone is Nogales in?
The USDA's 2023 map puts Nogales in zone 8b in ZIP code 85621, the nearest ZIP area. By the same method at Nogales's NOAA station, the coldest night of a typical year reaches 18°F (21 years, 1991-2020): zone 8b.
How late can frost come in Nogales?
In half of years the last 32°F night comes after March 20; in one year in ten it comes after April 13. Waiting until April 13 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Arizona climateThe statewide normals and every place in the state
- Rio Rico, AZ7 miles from this station, 62.4°F a year
- Tumacacori National Monument, AZ16 miles from this station, 63.0°F a year
- Canelo (1 mi NW), AZ21 miles from this station, 58.3°F a year
- Sonoita, AZ21 miles from this station, 61.6°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made