Updated October 2026
Organ Pipe Cactus National Monument Weather by Month
Organ Pipe Cactus National Monument is warmest in July, when the nearest NOAA climate station averages a high of 104°F and a low of 76°F, and coldest in December, with an average high of 70°F and an average low of 41°F. August is the wettest month, with about 1.8 inches of precipitation.
These figures are NOAA's 1991–2020 climate normals, the 30-year average for each calendar month, from the nearest long-record weather station, 6.5 miles from the park's reference point. A single station cannot describe a whole park: temperatures elsewhere in Organ Pipe Cactus National Monument can differ from these, particularly with elevation.
Warmest month
Jul
104°F avg high
Coldest month
Dec
41°F avg low
Wettest month
Aug
1.8 in avg
Longest days
Jun
14.1 h of daylight
Average weather at Organ Pipe Cactus by month
| Month | Avg high | Avg low | Precipitation | Daylight |
|---|---|---|---|---|
| January | 71°F | 41°F | 1.0 in | 10.1 h |
| February | 73°F | 43°F | 0.9 in | 10.9 h |
| March | 79°F | 47°F | 0.8 in | 11.8 h |
| April | 86°F | 52°F | 0.3 in | 12.8 h |
| May | 93°F | 59°F | 0.2 in | 13.6 h |
| June | 102°F | 68°F | 0.1 in | 14.1 h |
| July | 104°F | 76°F | 1.3 in | 13.9 h |
| August | 103°F | 75°F | 1.8 in | 13.2 h |
| September | 99°F | 70°F | 0.8 in | 12.2 h |
| October | 90°F | 59°F | 0.6 in | 11.2 h |
| November | 79°F | 48°F | 0.4 in | 10.3 h |
| December | 70°F | 41°F | 1.1 in | 9.9 h |
| Year total | 9.3 in |
NOAA 1991–2020 climate normals from station USC00026132, 6.5 miles from the park's reference point. The station's snowfall normal is zero in all twelve months. Daylight is the monthly average, computed from the park's latitude. Each month links to how crowded Organ Pipe Cactus is at that time of year.
Organ Pipe Cactus weather by season
Winter: December to February
Average highs climb from 70°F in December to 73°F in February, with average lows near 42°F. Together the three months average 3 inches of precipitation, about 32% of the yearly total. Daylight is at its shortest, about 9.9 hours in December.
Spring: March to May
Average highs climb from 79°F in March to 93°F in May, with average lows between 47°F and 59°F. The average high is 90°F or hotter in May. Together the three months average 1.3 inches of precipitation, about 14% of the yearly total and less than in any other season. Daylight lengthens from about 11.8 hours in March to 13.6 in May.
Summer: June to August
Average highs hold near 103°F in all three months, with average lows between 68°F and 76°F. The average high is 100°F or hotter in all three months. Together the three months average 3.2 inches of precipitation, about 34% of the yearly total and more than in any other season. Daylight is at its longest, about 14.1 hours in June.
Fall: September to November
Average highs fall from 99°F in September to 79°F in November, with average lows between 48°F and 70°F. The average high is 90°F or hotter in September and October. Together the three months average 1.8 inches of precipitation, about 19% of the yearly total. Daylight shortens from about 12.2 hours in September to 10.3 in November.
What the National Park Service says about the weather
Summer months are hot, with temperatures exceeding 100F during the day and night-time temperatures in the high 70's. Winter months are milder, with temperatures in the 70s during the day and 30's to 40's in the evening.
Weather description courtesy of the National Park Service — official park site.
Today's forecast for Organ Pipe Cactus
Averages describe a typical month, not this week. For current conditions and the seven-day outlook, the National Weather Service issues a forecast for the park's reference point at 32.04°N, 112.86°W. It covers that one spot, so other elevations in the park can differ from it, as they do from the averages above.
National Weather Service forecast for Organ Pipe Cactus National Monument →
Weather and crowds together
July, the warmest month, is also the quietest, with about 0.6× the visitors of the park's average month. March is the busiest. To see those crowds set against the weather for all twelve months, read the best time to visit Organ Pipe Cactus National Monument. For hotels, cabins and rentals close to the park, see where to stay near Organ Pipe Cactus.
Where to stay near Organ Pipe Cactus
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Frequently Asked Questions
July is the warmest month at Organ Pipe Cactus National Monument, with an average high of 104°F and an average low of 76°F. That is the 1991–2020 average at the nearest long-record NOAA station, 6.5 miles from the park's reference point. Temperatures inside the park can differ, particularly with elevation.
December is the coldest month at Organ Pipe Cactus National Monument, with an average low of 41°F and an average high of 70°F, based on NOAA 1991–2020 climate normals.
August is the wettest month, with about 1.8 inches of precipitation. June is the driest, at about 0.1 inches. The station records about 9.3 inches of precipitation in an average year.
The nearest long-record NOAA station, 6.5 miles from the park's reference point, shows no measurable snowfall in any month of its 1991–2020 normals.
Weather at nearby parks
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Sources: NOAA NCEI U.S. Climate Normals 1991–2020 (station USC00026132), daylight computed from latitude, weather description from the National Park Service, crowd levels from National Park Service Visitor Use Statistics (1979–2025). Updated 2026-10-11. Lodging results are provided by Stay22; WhenToVisitParks may earn a commission from bookings, at no extra cost to you.