Arizona has a warm subtropical climate with warm summers and cold winters.
Arizona has an average annual temperature of 70.0°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 116.8°F, while Flagstaff is the coldest with average January lows of 9.7°F. Humidity remains relatively low throughout the year, especially during winter months, creating cold and dry conditions. These seasonal patterns make summer pleasant for travel, while winters can bring frost and occasional snowfall.
| Month | 🌤️ | High | Low | Avg | Humid % | Rain (mm) | Wind (m/s) | Solar (kWh/m²) |
|---|---|---|---|---|---|---|---|---|
| January | 🌤️ | 75.0°F | 27.9°F | 51.4°F | 49% | 31 | 2.1 | 3.40 |
| February | 🌤️ | 79.0°F | 30.2°F | 54.5°F | 46% | 30 | 2.1 | 4.30 |
| March | ☀️ | 86.0°F | 34.5°F | 60.3°F | 41% | 28 | 2.2 | 5.70 |
| April | ☀️ | 94.8°F | 40.6°F | 67.6°F | 32% | 9 | 2.4 | 7.20 |
| May | 😎 | 102.2°F | 48.9°F | 75.6°F | 25% | 6 | 2.4 | 8.00 |
| June | 🥵 | 110.3°F | 60.1°F | 85.1°F | 19% | 4 | 2.4 | 8.30 |
| July | 🥵 | 111.9°F | 70.0°F | 90.9°F | 32% | 36 | 2.1 | 7.40 |
| August | 🥵 | 109.4°F | 69.6°F | 89.4°F | 38% | 42 | 1.9 | 6.80 |
| September | 😎 | 105.1°F | 59.4°F | 82.2°F | 35% | 26 | 2.0 | 6.00 |
| October | ☀️ | 96.6°F | 45.9°F | 71.2°F | 34% | 19 | 2.0 | 4.90 |
| November | ☀️ | 85.1°F | 34.7°F | 59.9°F | 38% | 21 | 2.1 | 3.80 |
| December | 🌤️ | 75.2°F | 28.2°F | 51.8°F | 48% | 30 | 2.0 | 3.10 |
Showing average climate conditions across 45 years (1981–2025) · averaged across all 25 cities in Arizona
🧥 Expect frosty nights and below-freezing temperatures during this Cold Winter period.
🌤️ 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 make summer pleasant for travel, while winters can bring frost and occasional snowfall.
Region-wide monthly rainfall · 1981–2025 · mm/month
Monthly averages · 1981–2025
💧 Humidity peaks at 49% in January · annual avg 36%
The warmest year on record was 2025 (avg: 73.8°F), while the coldest year was 1991 (avg: 67.3°F).
Averaged across all 25 cities in Arizona · Last 10 years · °F
Averaged across all 25 cities in Arizona · Last 10 years · mm/year
🔥 hottest · ❄️ coldest · 🌧️ wettest
ℹ️ Values are averages across all 25 cities in Arizona for each year.
| Year | Min Temp | Avg Temp | Max Temp | Rainfall (mm) | Avg Humidity | Avg Wind |
|---|---|---|---|---|---|---|
2025 🔥 | 50.0°F | 73.8°F | 97.5°F | 279 | 32% | 2.1 m/s |
2024 | 48.4°F | 72.1°F | 95.9°F | 203 | 33% | 2.0 m/s |
2023 | 46.9°F | 70.7°F | 94.6°F | 228 | 35% | 2.2 m/s |
2022 | 46.9°F | 70.3°F | 93.7°F | 270 | 35% | 2.1 m/s |
2021 | 48.7°F | 72.1°F | 95.5°F | 308 | 33% | 2.1 m/s |
2020 | 46.6°F | 71.8°F | 97.0°F | 147 | 32% | 2.1 m/s |
2019 | 45.1°F | 69.1°F | 93.0°F | 346 | 38% | 2.1 m/s |
2018 | 47.8°F | 71.2°F | 94.5°F | 257 | 34% | 2.1 m/s |
2017 | 48.0°F | 72.1°F | 96.4°F | 204 | 34% | 2.1 m/s |
2016 | 48.0°F | 71.2°F | 94.6°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.
