Zion National Park, Utah climate: Climate normals at a NOAA weather station
Zion National Park's normal year runs from 29°F December nights to 100°F July afternoons, with 16.3 inches of precipitation and 4 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 16.7°C, December lows of −1°C, July highs of 38°C, 413 mm of precipitation a year.
- NOAA stationZion National Park
- Station IDUSC00429717
- Location37.21°N 112.98°W
- Elevation4,038 ft (1,231 m)
On October 23, the normal high in Zion National Park is 75°F and the normal low 46°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 Zion National Park.
- Jan 54° 30°
- Feb 58° 34°
- Mar 66° 39°
- Apr 73° 44°
- May 84° 53°
- Jun 95° 62°
- Jul 100° 70°
- Aug 98° 69°
- Sep 91° 61°
- Oct 78° 49°
- Nov 64° 37°
- Dec 53° 29°
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 Zion National Park each month?
July is the warmest month, with normal highs of 100°F; December the coldest, with normal lows of 29°F. The most precipitation falls in February (2.06 in), the least in June (0.23 in).
Each month has its own page with the day-by-day normals, the month's records and its recent years:
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 54°F | 30°F | 42.1°F | 1.99 | 0.7 | 7 | <1 | 18 | 9 h 50 min |
| February | 58°F | 34°F | 45.6°F | 2.06 | 0.8 | 8 | <1 | 12 | 10 h 50 min |
| March | 66°F | 39°F | 52.4°F | 2.01 | 0.7 | 7 | <1 | 7 | 11 h 50 min |
| April | 73°F | 44°F | 58.4°F | 1.22 | 0.0 | 6 | 1 | 3 | 13 h 10 min |
| May | 84°F | 53°F | 68.0°F | 0.77 | 0.0 | 5 | 10 | <1 | 14 h 10 min |
| June | 95°F | 62°F | 78.8°F | 0.23 | 0.0 | 2 | 25 | <1 | 14 h 40 min |
| July | 100°F | 70°F | 84.9°F | 1.15 | 0.0 | 5 | 30 | <1 | 14 h 30 min |
| August | 98°F | 69°F | 83.3°F | 1.63 | 0.0 | 6 | 30 | <1 | 13 h 40 min |
| September | 91°F | 61°F | 76.0°F | 1.17 | 0.0 | 4 | 20 | <1 | 12 h 30 min |
| October | 78°F | 49°F | 63.4°F | 1.22 | 0.0 | 5 | 4 | 2 | 11 h 20 min |
| November | 64°F | 37°F | 50.6°F | 1.18 | 0.1 | 4 | <1 | 9 | 10 h 10 min |
| December | 53°F | 29°F | 40.9°F | 1.64 | 1.7 | 7 | <1 | 20 | 9 h 40 min |
| Year (annual) | 76°F | 48°F | 62.0°F | 16.27 | 4.0 | 66 | 119 | 71 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 12°C | −1°C | 5.6°C | 51 mm | 2 cm |
| February | 14°C | 1°C | 7.6°C | 52 mm | 2 cm |
| March | 19°C | 4°C | 11.3°C | 51 mm | 2 cm |
| April | 23°C | 7°C | 14.7°C | 31 mm | 0 cm |
| May | 29°C | 11°C | 20.0°C | 20 mm | 0 cm |
| June | 35°C | 17°C | 26.0°C | 6 mm | 0 cm |
| July | 38°C | 21°C | 29.4°C | 29 mm | 0 cm |
| August | 37°C | 20°C | 28.5°C | 41 mm | 0 cm |
| September | 33°C | 16°C | 24.4°C | 30 mm | 0 cm |
| October | 26°C | 9°C | 17.4°C | 31 mm | 0 cm |
| November | 18°C | 3°C | 10.3°C | 30 mm | 0 cm |
| December | 11°C | −1°C | 4.9°C | 42 mm | 4 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00429717; 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 Zion National Park?
Normal highs sit between 65°F and 85°F in March, April, May and October. Of those, May has the fewest days with rain (5).
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 USC00429717.
When is the last frost at Zion National Park?
In Zion National Park, the last spring frost (32°F) comes after April 13 in half of years and after May 2 in one year in ten; the first autumn frost comes before November 2 in half of years and before October 20 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
- April 131 year in 10 after May 2; 9 in 10 after March 22
- First autumn frost, half of years before
- November 21 year in 10 before October 20; 9 in 10 before November 17
NOAA puts the median frost-free season at 202 days, and the season without a hard freeze (28°F) at 231 days.
A hard freeze (28°F) comes after March 23 in half of springs and before November 12 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Zion National Park in zone 6b in ZIP code 84767, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, the station is in zone 8a: the coldest night of a typical year reaches 11°F (30 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 Utah · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00429717; 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 at Zion National Park?
In a normal year in Zion National Park, 119 days a year reach 90°F (51 of them 100°F or more), 71 nights fall to 32°F or colder and 66 days bring measurable precipitation.
- Days at 90°F or more
- 119a normal year
- Days at 100°F or more
- 51a normal year
- Nights at 32°F or colder
- 71a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 66a normal year
- Days with 1 inch of snow or more
- 1a normal year
The highest temperature in this station's record (since 1904) is 115°F, on July 1, 1950; the lowest is −15°F, on January 21, 1937.
The wettest calendar year on that record is 1983, with 25.55 in; the snowiest season is 1948–49, with 45.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00429717; records: ACIS (NOAA Regional Climate Centers), station USC00429717. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Zion National Park?
Over a year 84% of the sunlight that would reach the ground under clear skies gets through the clouds at Zion National Park, 5.3 kWh per square metre a day. June is the sunniest month (91%) and December the cloudiest (77%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 80% | 2.9 |
| February | 78% | 3.7 |
| March | 81% | 5.1 |
| April | 83% | 6.5 |
| May | 85% | 7.4 |
| June | 91% | 8.3 |
| July | 82% | 7.1 |
| August | 84% | 6.5 |
| September | 87% | 5.8 |
| October | 86% | 4.4 |
| November | 83% | 3.2 |
| December | 77% | 2.5 |
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 many heating and cooling degree days does Zion National Park record?
A normal year at Zion National Park brings 3,257 heating degree days, 39% fewer than the median U.S. place (5,373), and 2,211 cooling degree days, 2.4 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 5,324 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 710 | 0 |
| February | 543 | 0 |
| March | 393 | 3 |
| April | 220 | 24 |
| May | 67 | 160 |
| June | 5 | 417 |
| July | 0 | 617 |
| August | 0 | 569 |
| September | 9 | 339 |
| October | 127 | 79 |
| November | 436 | 4 |
| December | 747 | 0 |
| Year (annual) | 3,257 | 2,211 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00429717. 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 Zion National Park been warmer than normal?
2024 averaged 64.2°F, 2.2°F above the 1991-2020 normal of 62.0°F. 1 of the 2 complete years since 2022 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2022 | 61.0°F | −1.0°F | 14.36 | 13.1 |
| 2024 | 64.2°F | +2.2°F | 10.62 | – |
Over 77 complete years from 1928 to 2024, the station's annual mean temperature rose at a fitted 2.4°F per century (+0.13°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00429717; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Zion National Park's climate compare?
Zion National Park is warmer than 96 of the 97 places with their own NOAA record in Utah, and wetter than 67. Across the 7,247 U.S. stations with normals, its annual mean of 62.0°F is warmer than 80%.
In the Köppen classification computed from these normals, Zion National Park is BSk: cold 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 Zion National Park share this climate record?
Springdale has no NOAA station with 1991-2020 normals of its 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.
- Springdale, UT595 people · 2 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 Zion National Park's climate
What is the coldest month at Zion National Park?
December, with a normal high of 53°F and a normal low of 29°F. The warmest is July (100°F by day, 70°F at night).
Does it snow at Zion National Park?
Yes: 4 inches in a normal year, falling on 2 days with 0.1 inch or more, the most in December (1.7 inches).
What is the rainiest month at Zion National Park?
February, with 2.06 in of precipitation in a normal year; the driest is June with 0.23 in.
What plant hardiness zone is Zion National Park in?
The USDA's 2023 map puts Zion National Park in zone 6b in ZIP code 84767, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches 11°F (30 years, 1991-2020): zone 8a.
How late can frost come at Zion National Park?
In half of years the last 32°F night comes after April 13; in one year in ten it comes after May 2. Waiting until May 2 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Zion National Park in OctoberThis month day by day, its records and recent years
- Utah climateThe statewide normals and every place in the state
- Colorado City, AZ15 miles from this station, 56.1°F a year
- La Verkin, UT16 miles from this station, 60.8°F a year
- Orderville, UT19 miles from this station, 51.8°F a year
- New Harmony, UT24 miles from this station, 51.6°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made