Updated October 2026
Tumacácori National Historical Park Weather by Month
Tumacácori National Historical Park is warmest in June, when the nearest NOAA climate station averages a high of 95°F and a low of 59°F, and coldest in December, with an average high of 63°F and an average low of 32°F. July is the wettest month, with about 3.8 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, 0.1 miles from the park's reference point. A single station cannot describe a whole park: temperatures elsewhere in Tumacácori National Historical Park can differ from these, particularly with elevation.
Warmest month
Jun
95°F avg high
Coldest month
Dec
32°F avg low
Wettest month
Jul
3.8 in avg
Longest days
Jun
14.0 h of daylight
Average weather at Tumacácori by month
| Month | Avg high | Avg low | Precipitation | Daylight |
|---|---|---|---|---|
| January | 63°F | 32°F | 1.2 in | 10.2 h |
| February | 66°F | 34°F | 1.1 in | 10.9 h |
| March | 72°F | 38°F | 0.8 in | 11.8 h |
| April | 78°F | 43°F | 0.3 in | 12.8 h |
| May | 86°F | 49°F | 0.2 in | 13.6 h |
| June | 95°F | 59°F | 0.5 in | 14.0 h |
| July | 93°F | 67°F | 3.8 in | 13.9 h |
| August | 91°F | 66°F | 3.4 in | 13.2 h |
| September | 89°F | 60°F | 1.8 in | 12.2 h |
| October | 81°F | 48°F | 1.1 in | 11.2 h |
| November | 71°F | 38°F | 0.9 in | 10.4 h |
| December | 63°F | 32°F | 1.0 in | 10.0 h |
| Year total | 16.1 in |
NOAA 1991–2020 climate normals from station USC00028865, 0.1 miles from the park's reference point. Snowfall at the station totals about 0.1 inches in an average year. Daylight is the monthly average, computed from the park's latitude. Each month links to how crowded Tumacácori is at that time of year.
Tumacácori weather by season
Winter: December to February
Average highs climb from 63°F in December to 66°F in February, with average lows near 33°F. The average low is at or below freezing in December and January. Together the three months average 3.3 inches of precipitation, about 20% of the yearly total. Daylight is at its shortest, about 10.0 hours in December.
Spring: March to May
Average highs climb from 72°F in March to 86°F in May, with average lows between 38°F and 49°F. Together the three months average 1.3 inches of precipitation, about 8% 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 fall from 95°F in June to 91°F in August, with average lows between 59°F and 67°F. The average high is 90°F or hotter in all three months. Together the three months average 7.7 inches of precipitation, about 48% of the yearly total and more than in any other season. Daylight is at its longest, about 14.0 hours in June.
Fall: September to November
Average highs fall from 89°F in September to 71°F in November, with average lows between 38°F and 60°F. Together the three months average 3.8 inches of precipitation, about 24% of the yearly total. Daylight shortens from about 12.2 hours in September to 10.4 in November.
What the National Park Service says about the weather
Located above the heat of the low desert, Tumacácori National Historical Park is in the mesquite highlands, close to 3,300 feet in elevation, where temperatures are five to ten degrees cooler than Tucson or Phoenix. Visiting the park in this moderate climate is pleasurable during any season of the year but remember to prepare accordingly. Bring layered clothing and drink plenty of water.
Weather description courtesy of the National Park Service — official park site.
Today's forecast for Tumacácori
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 31.57°N, 111.05°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 Tumacácori National Historical Park →
Weather and crowds together
June, the warmest month, sees about 0.4× the visitors of the park's average month. December is the busiest month of the year and August the quietest. To see those crowds set against the weather for all twelve months, read the best time to visit Tumacácori National Historical Park. For hotels, cabins and rentals close to the park, see where to stay near Tumacácori.
Where to stay near Tumacácori
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Top-rated places to stay near Tumacácori
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Frequently Asked Questions
June is the warmest month at Tumacácori National Historical Park, with an average high of 95°F and an average low of 59°F. That is the 1991–2020 average at the nearest long-record NOAA station, 0.1 miles from the park's reference point. Temperatures inside the park can differ, particularly with elevation.
December is the coldest month at Tumacácori National Historical Park, with an average low of 32°F and an average high of 63°F, based on NOAA 1991–2020 climate normals.
July is the wettest month, with about 3.8 inches of precipitation. May is the driest, at about 0.2 inches. The station records about 16.1 inches of precipitation in an average year.
Rarely, by the station's record. The nearest long-record NOAA station, 0.1 miles from the park's reference point, totals about 0.1 inches of snow in an average year.
Weather at nearby parks
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102 mi away · warmest in June (91°F)
103 mi away · warmest in July (107°F)
105 mi away · warmest in June (91°F)
111 mi away · warmest in July (104°F)
Keep exploring
Sources: NOAA NCEI U.S. Climate Normals 1991–2020 (station USC00028865), 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.