Saguaro National Park, Arizona climate: Climate normals at a NOAA weather station
Saguaro National Park's normal year runs from 41°F December nights to 100°F July afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 21.1°C, December lows of 5°C, July highs of 38°C.
- NOAA stationSaguaro National Park
- Station IDUSC00027398
- Location32.18°N 110.74°W
- Elevation3,080 ft (939 m)
On October 23, the normal high in Saguaro National Park is 84°F and the normal low 57°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Saguaro National Park.
- Jan 65° 41°
- Feb 68° 43°
- Mar 74° 48°
- Apr 82° 54°
- May 91° 62°
- Jun 101° 72°
- Jul 100° 74°
- Aug 98° 73°
- Sep 94° 69°
- Oct 86° 59°
- Nov 75° 49°
- Dec 65° 41°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Saguaro National Park each month?
July is the warmest month, with normal highs of 100°F; December the coldest, with normal lows of 41°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 65°F | 41°F | 53.2°F | – | <1 | 2 | 10 h 20 min |
| February | 68°F | 43°F | 55.5°F | – | <1 | 2 | 11 h |
| March | 74°F | 48°F | 61.4°F | – | 1 | <1 | 12 h |
| April | 82°F | 54°F | 67.8°F | – | 7 | <1 | 13 h |
| May | 91°F | 62°F | 76.7°F | – | 18 | <1 | 13 h 50 min |
| June | 101°F | 72°F | 86.1°F | – | 30 | <1 | 14 h 10 min |
| July | 100°F | 74°F | 86.8°F | – | 30 | <1 | 14 h |
| August | 98°F | 73°F | 85.3°F | – | 29 | <1 | 13 h 20 min |
| September | 94°F | 69°F | 81.2°F | – | 24 | <1 | 12 h 20 min |
| October | 86°F | 59°F | 72.4°F | – | 10 | <1 | 11 h 30 min |
| November | 75°F | 49°F | 61.6°F | – | 1 | <1 | 10 h 30 min |
| December | 65°F | 41°F | 52.6°F | – | <1 | 3 | 10 h |
| Year (annual) | 83°F | 57°F | 70.0°F | – | 150 | 8 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | 18°C | 5°C | 11.8°C |
| February | 20°C | 6°C | 13.1°C |
| March | 24°C | 9°C | 16.3°C |
| April | 28°C | 12°C | 19.9°C |
| May | 33°C | 17°C | 24.8°C |
| June | 38°C | 22°C | 30.1°C |
| July | 38°C | 23°C | 30.4°C |
| August | 37°C | 23°C | 29.6°C |
| September | 34°C | 20°C | 27.3°C |
| October | 30°C | 15°C | 22.4°C |
| November | 24°C | 9°C | 16.4°C |
| December | 18°C | 5°C | 11.4°C |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00027398; 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.
Which months are mildest at Saguaro National Park?
Normal highs sit between 65°F and 85°F in January, February, March, April and November.
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 USC00027398.
When is the last frost at Saguaro National Park?
In Saguaro National Park, the last spring frost (32°F) comes after January 26 in half of years and after February 25 in one year in ten; the first autumn frost comes before December 16 in half of years and before November 26 in one year in ten. A night at 32°F or colder comes at all in 93% of years here (NOAA).
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- January 261 year in 10 after February 25; 9 in 10 after December 24
- First autumn frost, half of years before
- December 161 year in 10 before November 26; 9 in 10 before January 17
NOAA puts the median frost-free season at 326 days, and the season without a hard freeze (28°F) at 363 days.
A hard freeze (28°F) comes after January 7 in half of springs and before December 28 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Saguaro National Park in zone 9a in ZIP code 85730, the nearest ZIP area.
Frost dates for every NOAA station in Arizona · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00027398; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. 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 at Saguaro National Park?
In a normal year in Saguaro National Park, 150 days a year reach 90°F (64 of them 100°F or more) and 8 nights fall to 32°F or colder.
- Days at 90°F or more
- 150a normal year
- Days at 100°F or more
- 64a normal year
- Nights at 32°F or colder
- 8a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00027398.
How sunny is it at Saguaro National Park?
Over a year 89% of the sunlight that would reach the ground under clear skies gets through the clouds at Saguaro National Park, 5.8 kWh per square metre a day. June is the sunniest month (94%) and July the cloudiest (84%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 86% | 3.6 |
| February | 85% | 4.5 |
| March | 89% | 6.0 |
| April | 93% | 7.4 |
| May | 94% | 8.2 |
| June | 94% | 8.3 |
| July | 84% | 6.9 |
| August | 86% | 6.5 |
| September | 88% | 5.9 |
| October | 92% | 5.1 |
| November | 89% | 3.9 |
| December | 85% | 3.3 |
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 many heating and cooling degree days does Saguaro National Park record?
A normal year at Saguaro National Park brings 1,399 heating degree days, 74% fewer than the median U.S. place (5,373), and 3,262 cooling degree days, 3.6 times the median (908). Two months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 7,487 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 367 | 1 |
| February | 272 | 6 |
| March | 151 | 37 |
| April | 47 | 129 |
| May | 5 | 368 |
| June | 0 | 634 |
| July | 0 | 674 |
| August | 0 | 628 |
| September | 0 | 486 |
| October | 18 | 246 |
| November | 155 | 52 |
| December | 386 | 2 |
| Year (annual) | 1,399 | 3,262 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00027398. 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.
Have recent years at Saguaro National Park been warmer than normal?
2024 averaged 72.1°F, 2.1°F above the 1991-2020 normal of 70.0°F.
| Year | Mean | Against normal |
|---|---|---|
| 2024 | 72.1°F | +2.1°F |
Source: observed years: ACIS, station USC00027398. A year counts only with all twelve months complete.
How does Saguaro National Park's climate compare?
Saguaro National Park is warmer than 65 of the 97 places with their own NOAA record in Arizona. Across the 7,247 U.S. stations with normals, its annual mean of 70.0°F is warmer than 95%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Which places near Saguaro National Park 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.
- Vail, AZ15,722 people · 11 mi S
- Tanque Verde, AZ15,531 people · 6 mi N
- Rincon Valley, AZ5,851 people · 6 mi SE
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 Saguaro National Park's climate
What is the coldest month at Saguaro National Park?
December, with a normal high of 65°F and a normal low of 41°F. The warmest is July (100°F by day, 74°F at night).
What plant hardiness zone is Saguaro National Park in?
The USDA's 2023 map puts Saguaro National Park in zone 9a in ZIP code 85730, the nearest ZIP area.
How late can frost come at Saguaro National Park?
In half of years the last 32°F night comes after January 26; in one year in ten it comes after February 25. Waiting until February 25 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Arizona climateThe statewide normals and every place in the state
- Tucson, AZ13 miles from this station, 70.6°F a year
- Mount Lemmon Willow Canyon, AZ14 miles from this station, 55.9°F a year
- Tucson U Of A #1, AZ17 miles from this station, 70.3°F a year
- Casas Adobes, AZ18 miles from this station, 69.3°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made