Arizona has a warm subtropical climate with warm summers and mild winters.
Arizona has an average annual temperature of 69.8°F across all 25 cities, with approximately 281 mm of annual precipitation and average humidity of 36%. Temperatures peak in July and drop to their lowest in January, while rainfall is highest during summer months.
The warmest city is Yuma with average July highs of 107.6°F, while Flagstaff is the coldest with average January lows of 23.7°F. Humidity remains relatively low throughout the year, especially during winter months, creating warm and dry conditions. These seasonal patterns offer comfortable conditions year-round, with warm summers and mild winters.
| Month | 🌤️ | Avg High | Avg Temp | Avg Low | Record High | Record Low | Humid % | Rain (mm) | Wind (m/s) | Solar (kWh/m²) |
|---|---|---|---|---|---|---|---|---|---|---|
| January | 🌤️ | 63.7°F | 51.4°F | 39.0°F | 87.8°F | -8.3°F | 49% | 31 | 2.1 | 3.40 |
| February | 🌤️ | 66.9°F | 54.1°F | 41.2°F | 93.2°F | -3.3°F | 46% | 30 | 2.1 | 4.30 |
| March | ☀️ | 73.4°F | 59.4°F | 45.3°F | 101.1°F | 6.1°F | 41% | 28 | 2.2 | 5.70 |
| April | ☀️ | 81.7°F | 66.6°F | 51.4°F | 106.2°F | 11.7°F | 32% | 9 | 2.4 | 7.20 |
| May | 😎 | 90.9°F | 75.6°F | 60.1°F | 115.5°F | 21.9°F | 25% | 6 | 2.4 | 8.00 |
| June | 🥵 | 101.5°F | 85.8°F | 70.2°F | 122.7°F | 32.5°F | 19% | 4 | 2.4 | 8.30 |
| July | 🥵 | 102.7°F | 89.8°F | 77.0°F | 124.2°F | 46.8°F | 32% | 36 | 2.1 | 7.40 |
| August | 🥵 | 100.8°F | 88.5°F | 76.5°F | 120.7°F | 47.8°F | 38% | 42 | 1.9 | 6.80 |
| September | 🥵 | 96.3°F | 83.1°F | 70.2°F | 118.0°F | 30.4°F | 35% | 26 | 2.0 | 6.00 |
| October | 😎 | 85.3°F | 71.8°F | 58.3°F | 113.5°F | 16.0°F | 34% | 19 | 2.0 | 4.90 |
| November | ☀️ | 72.9°F | 59.9°F | 47.1°F | 98.2°F | 9.3°F | 38% | 21 | 2.1 | 3.80 |
| December | 🌤️ | 63.3°F | 51.4°F | 39.4°F | 86.5°F | -13.5°F | 48% | 30 | 2.0 | 3.10 |
Showing average climate conditions across 45 years (1981–2025) · averaged across all 25 cities in Arizona
🧥 Light layers are sufficient — this Mild Winter stays cool without prolonged hard freezes.
🌤️ Limit midday outdoor exposure and stay hydrated — this is an intense Hot Summer.
☔ Rainfall is spread across the year with no sharply defined wet season.
Region-wide monthly averages across 25 cities · 1981–2025 · °F
Temperatures rise steadily from spring, peak in July, and gradually decline through autumn into winter.
These seasonal patterns offer comfortable conditions year-round, with warm summers and mild winters.
Region-wide monthly rainfall · 1981–2025 · mm/month
💧 Humidity peaks at 49% in January · annual avg 36%
Monthly averages · 1981–2025
Across 45 years, Arizona's temperature shows a slight warming trend over the past decade. 2025 was the warmest year overall and 1983 the coolest.
The warmest year on record was 2025 (avg: 72.5°F), while the coldest year was 1983 (avg: 67.3°F).
Averaged across all 25 cities in Arizona · Last 30 years · °F
Averaged across all 25 cities in Arizona · Last 30 years · mm/year
🔥 hottest · ❄️ coldest · 🌧️ wettest
ℹ️ Values are averages across all 25 cities in Arizona for each year.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall (mm) | Avg Humidity | Avg Wind |
|---|---|---|---|---|---|---|---|---|
2025 🔥 | 86.0°F | 72.5°F | 58.8°F | 119.7°F | 9.7°F | 279 | 32% | 2.1 m/s |
2024 | 85.8°F | 72.3°F | 58.8°F | 122.7°F | 10.6°F | 203 | 33% | 2.0 m/s |
2023 | 84.0°F | 70.7°F | 57.4°F | 118.6°F | 3.7°F | 228 | 35% | 2.2 m/s |
2022 | 84.0°F | 70.7°F | 57.4°F | 115.2°F | 5.4°F | 270 | 35% | 2.1 m/s |
2021 | 84.7°F | 71.6°F | 58.3°F | 120.7°F | 6.1°F | 308 | 33% | 2.1 m/s |
2020 | 85.8°F | 72.0°F | 58.1°F | 119.8°F | 12.2°F | 147 | 32% | 2.1 m/s |
2019 | 82.4°F | 69.6°F | 56.7°F | 117.1°F | -2.9°F | 346 | 38% | 2.1 m/s |
2018 | 84.6°F | 71.6°F | 58.5°F | 117.1°F | 13.1°F | 257 | 34% | 2.1 m/s |
2017 | 85.6°F | 72.3°F | 59.0°F | 122.7°F | 3.2°F | 204 | 34% | 2.1 m/s |
2016 | 84.9°F | 71.6°F | 58.5°F | 122.7°F | 4.3°F | 252 | 35% | 2.2 m/s |
Showing 1 to 10 of 45 years
All weather data is sourced from NASA POWER (Prediction of Worldwide Energy Resources), a NASA project providing solar and meteorological data for renewable energy, building efficiency, and agricultural research.
