Oracle, Arizona climate: Normal weather by month, frost dates and records
Oracle's normal year runs from 36°F December nights to 91°F July afternoons, with 21.7 inches of precipitation and 11 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 16.8°C, December lows of 2°C, July highs of 33°C, 551 mm of precipitation a year.
- NOAA stationOracle (2 mi SE)
- Station IDUSC00026119
- Location32.60°N 110.73°W
- Elevation4,510 ft (1,375 m)
- Population (census place)3,154
On October 23, the normal high in Oracle is 74°F and the normal low 50°F, and the chance of measurable rain or snow is 15%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Oracle.
- Jan 56° 35°
- Feb 58° 37°
- Mar 64° 42°
- Apr 71° 46°
- May 82° 56°
- Jun 92° 66°
- Jul 91° 69°
- Aug 90° 67°
- Sep 86° 63°
- Oct 77° 52°
- Nov 64° 42°
- Dec 55° 36°
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 Oracle each month?
July is the warmest month, with normal highs of 91°F; December the coldest, with normal lows of 36°F. The most precipitation falls in July (4.25 in), the least in June (0.32 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 56°F | 35°F | 45.3°F | 2.29 | 2.9 | 7 | <1 | 11 | 10 h 10 min |
| February | 58°F | 37°F | 47.6°F | 2.07 | 1.9 | 6 | <1 | 7 | 11 h |
| March | 64°F | 42°F | 52.8°F | 1.66 | 2.5 | 6 | <1 | 5 | 12 h |
| April | 71°F | 46°F | 58.3°F | 0.64 | 1.2 | 3 | <1 | 2 | 13 h |
| May | 82°F | 56°F | 69.0°F | 0.50 | 0.0 | 2 | 5 | <1 | 13 h 50 min |
| June | 92°F | 66°F | 78.8°F | 0.32 | 0.0 | 2 | 20 | <1 | 14 h 20 min |
| July | 91°F | 69°F | 80.1°F | 4.25 | 0.0 | 10 | 22 | <1 | 14 h 10 min |
| August | 90°F | 67°F | 78.4°F | 3.80 | 0.0 | 12 | 15 | <1 | 13 h 20 min |
| September | 86°F | 63°F | 74.5°F | 1.84 | 0.0 | 6 | 6 | <1 | 12 h 30 min |
| October | 77°F | 52°F | 64.6°F | 1.08 | 0.0 | 4 | <1 | <1 | 11 h 30 min |
| November | 64°F | 42°F | 52.9°F | 1.28 | 0.5 | 4 | <1 | 4 | 10 h 30 min |
| December | 55°F | 36°F | 45.2°F | 1.97 | 1.8 | 5 | <1 | 12 | 10 h |
| Year (annual) | 74°F | 51°F | 62.3°F | 21.70 | 10.8 | 67 | 68 | 41 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 13°C | 2°C | 7.4°C | 58 mm | 7 cm |
| February | 14°C | 3°C | 8.7°C | 53 mm | 5 cm |
| March | 18°C | 5°C | 11.6°C | 42 mm | 6 cm |
| April | 22°C | 8°C | 14.6°C | 16 mm | 3 cm |
| May | 28°C | 13°C | 20.6°C | 13 mm | 0 cm |
| June | 33°C | 19°C | 26.0°C | 8 mm | 0 cm |
| July | 33°C | 20°C | 26.7°C | 108 mm | 0 cm |
| August | 32°C | 20°C | 25.8°C | 97 mm | 0 cm |
| September | 30°C | 17°C | 23.6°C | 47 mm | 0 cm |
| October | 25°C | 11°C | 18.1°C | 27 mm | 0 cm |
| November | 18°C | 5°C | 11.6°C | 33 mm | 1 cm |
| December | 13°C | 2°C | 7.3°C | 50 mm | 5 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00026119; 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 Oracle?
Normal highs sit between 65°F and 85°F in April, May and October. Of those, May 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 USC00026119.
When is the last frost in Oracle?
In Oracle, the last spring frost (32°F) comes after March 23 in half of years and after April 16 in one year in ten; the first autumn frost comes before November 22 in half of years and before November 2 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 231 year in 10 after April 16; 9 in 10 after February 18
- First autumn frost, half of years before
- November 221 year in 10 before November 2; 9 in 10 before December 7
NOAA puts the median frost-free season at 242 days, and the season without a hard freeze (28°F) at 283 days.
A hard freeze (28°F) comes after February 21 in half of springs and before December 2 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Oracle in zone 9a in ZIP code 85623, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Oracle's NOAA station is in zone 8b: the coldest night of a typical year reaches 19°F (16 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in Arizona · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00026119; 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 Oracle?
In a normal year in Oracle, 68 days a year reach 90°F (3 of them 100°F or more), 41 nights fall to 32°F or colder and 67 days bring measurable precipitation.
- Days at 90°F or more
- 68a normal year
- Days at 100°F or more
- 3a normal year
- Nights at 32°F or colder
- 41a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 67a normal year
- Days with 1 inch of snow or more
- 4a normal year
The highest temperature in Oracle's official record (kept by the National Weather Service since 1893) is 110°F, on June 16, 2021; the lowest is 2°F, on January 22, 1937.
The wettest calendar year on that record is 1983, with 43.85 in; the snowiest season is 1990–91, with 41.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00026119; records: ACIS (NOAA Regional Climate Centers), NWS threaded record OSPA3thr. Records use complete months only; a month missing more than three days is left out.
How sunny is Oracle?
Over a year 89% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Oracle, 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 much heating and cooling does Oracle need?
A normal year in Oracle brings 2,811 heating degree days, 48% fewer than the median U.S. place (5,373), and 1,845 cooling degree days, 2.0 times the median (908). Five months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 5,091 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 609 | 0 |
| February | 489 | 0 |
| March | 380 | 1 |
| April | 215 | 15 |
| May | 42 | 165 |
| June | 1 | 414 |
| July | 0 | 468 |
| August | 0 | 415 |
| September | 2 | 287 |
| October | 92 | 78 |
| November | 368 | 3 |
| December | 614 | 0 |
| Year (annual) | 2,811 | 1,845 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00026119. 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.
How does Oracle's climate compare?
Oracle is warmer than 36 of the other 96 places with their own NOAA record in Arizona, and wetter than 85. Across the 7,247 U.S. stations with normals, its annual mean of 62.3°F is warmer than 81%.
In the Köppen classification computed from these normals, Oracle is Csa: temperate, dry-summer, hot summer. 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 Oracle share this climate record?
4 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.
- Saddlebrooke, AZ12,616 people · 9 mi W
- Mammoth, AZ1,181 people · 6 mi N
- Dudleyville, AZ458 people · 18 mi N
- Campo Bonito, AZ33 people · 3 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.
What do Oracle's other NOAA stations record?
One more NOAA station keeps 1991-2020 normals in or near Oracle. This page uses Oracle (2 mi SE); the other differs by site and elevation:
| Station | From this station | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Oracle State Park USC00026117 | 1 mi N | 4,595 ft | 62.1°F | 31°F | 94°F | 15.6 | – | March 29 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Oracle's climate
What is the coldest month in Oracle?
December, with a normal high of 55°F and a normal low of 36°F. The warmest is July (91°F by day, 69°F at night).
Does it snow in Oracle?
Yes: 11 inches in a normal year, falling on 4 days with 0.1 inch or more, the most in January (2.9 inches).
What is the rainiest month in Oracle?
July, with 4.25 in of precipitation in a normal year; the driest is June with 0.32 in.
What plant hardiness zone is Oracle in?
The USDA's 2023 map puts Oracle in zone 9a in ZIP code 85623, the nearest ZIP area. By the same method at Oracle's NOAA station, the coldest night of a typical year reaches 19°F (16 years, 1991-2020): zone 8b.
How late can frost come in Oracle?
In half of years the last 32°F night comes after March 23; in one year in ten it comes after April 16. Waiting until April 16 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Arizona climateThe statewide normals and every place in the state
- San Manuel, AZ6 miles from this station, 66.7°F a year
- Mount Lemmon Willow Canyon, AZ15 miles from this station, 55.9°F a year
- Catalina, AZ17 miles from this station, 65.6°F a year
- Casas Adobes, AZ23 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