Tempe has a warm subtropical climate with warm summers and mild winters.
Temperatures peak in July and drop to their lowest in January, while rainfall is highest during summer months.
Humidity remains relatively low throughout the year, especially during winter months, creating warm and dry conditions.
| Month | 🌤️ | Avg High | Avg Temp | Avg Low | Record High | Record Low | Humid % | Rain (mm) | Wind (m/s) | Solar (kWh/m²) |
|---|---|---|---|---|---|---|---|---|---|---|
| January | 🌤️ | 66.2°F | 53.6°F | 41.1°F | 86.0°F | 21.0°F | 47% | 34 | 2.0 | 3.37 |
| February | 🌤️ | 69.2°F | 56.2°F | 43.2°F | 90.1°F | 21.2°F | 45% | 33 | 1.9 | 4.29 |
| March | ☀️ | 75.5°F | 61.5°F | 47.4°F | 98.6°F | 27.9°F | 41% | 32 | 2.0 | 5.68 |
| April | ☀️ | 84.0°F | 68.7°F | 53.5°F | 103.8°F | 34.3°F | 31% | 9 | 2.2 | 7.17 |
| May | 🌞 | 93.4°F | 77.9°F | 62.4°F | 111.6°F | 40.8°F | 23% | 6 | 2.2 | 8.02 |
| June | 🔥 | 104.1°F | 88.4°F | 72.6°F | 120.9°F | 54.5°F | 17% | 3 | 2.2 | 8.28 |
| July | 🔥 | 105.1°F | 92.4°F | 79.7°F | 123.1°F | 64.4°F | 30% | 35 | 2.0 | 7.38 |
| August | 🔥 | 103.1°F | 91.1°F | 79.0°F | 118.2°F | 64.2°F | 36% | 40 | 1.8 | 6.78 |
| September | 🔥 | 98.8°F | 85.8°F | 72.7°F | 114.4°F | 51.8°F | 33% | 26 | 1.9 | 6.03 |
| October | 🌞 | 87.8°F | 74.3°F | 60.7°F | 110.3°F | 37.2°F | 32% | 20 | 2.0 | 4.92 |
| November | ☀️ | 75.3°F | 62.4°F | 49.4°F | 97.5°F | 27.9°F | 37% | 23 | 2.0 | 3.75 |
| December | 🌤️ | 65.9°F | 53.7°F | 41.6°F | 85.3°F | 17.6°F | 46% | 34 | 1.9 | 3.05 |
Showing average climate conditions across 45 years (1981–2025)
🧥 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.
Monthly averages · 1981–2025 climate normals · °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.
Monthly rainfall · 1981–2025 seasonal trends · mm/month
Rainfall is concentrated in the summer months. Humidity stays relatively low (around 35%), peaking during winter months, which creates warm and dry conditions.
☔ Rainfall is spread across the year with no sharply defined wet season.
Monthly averages · 1981–2025
Across 45 years of records, Tempe's temperature shows a slight warming trend over the past decade. Its hottest day reached 123.1°F in July 1995, and its coldest dropped to 17.5°F in December 1990. 2025 was the warmest year overall and 1983 the coolest.
The warmest year in Tempe's recorded history was 2025 (avg: 74.8°F), while the coldest was 1983 (avg: 69.6°F).
Average annual high/low · Last 30 years · °F
Total annual precipitation · Last 30 years · mm/year
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall (mm) | Avg Humidity | Avg Wind |
|---|---|---|---|---|---|---|---|---|
2025 🔥 | 88.3°F | 74.8°F | 61.2°F | 118.2°F | 29.3°F | 286 | 31% | 1.9 m/s |
2024 | 88.0°F | 74.5°F | 61.0°F | 116.1°F | 27.9°F | 214 | 31% | 1.9 m/s |
2023 | 86.5°F | 73.2°F | 59.9°F | 117.5°F | 28.8°F | 243 | 33% | 2.0 m/s |
2022 | 86.4°F | 72.9°F | 59.4°F | 114.1°F | 28.0°F | 279 | 34% | 2.0 m/s |
2021 | 87.1°F | 73.8°F | 60.4°F | 117.0°F | 31.8°F | 358 | 32% | 1.9 m/s |
2020 | 88.3°F | 74.5°F | 60.4°F | 117.3°F | 28.0°F | 156 | 30% | 2.0 m/s |
2019 | 84.9°F | 72.0°F | 59.2°F | 114.6°F | 25.3°F | 376 | 37% | 2.0 m/s |
2018 | 86.9°F | 73.9°F | 60.8°F | 115.9°F | 29.8°F | 267 | 32% | 1.9 m/s |
2017 | 88.2°F | 74.8°F | 61.5°F | 119.5°F | 29.1°F | 210 | 32% | 1.9 m/s |
2016 | 87.4°F | 74.1°F | 61.0°F | 118.0°F | 28.2°F | 255 | 33% | 2.0 m/s |
Showing 1 to 10 of 45 years
Based on 45 years of data (1981–2025), July is typically the hottest month in Tempe, Arizona, with average high temperatures around 105.1°F.
January is the coldest month in Tempe, with average low temperatures around 41.1°F.
August receives the most rainfall with approximately 40 mm, while June is the driest with 3 mm.
The highest recorded temperature was 123.1°F in July 1995. This is part of the historical record spanning 1981–2025.
The lowest recorded temperature was 17.5°F in December 1990.
This page covers 45 years of climate data from 1981 to 2025. As new data is added to the database the page automatically reflects the updated coverage.
Tempe receives the most sunlight in June with an average solar radiation of 8.28 kWh/m²/day. This solar radiation data, sourced from NASA POWER, is useful for solar energy planning and agriculture in Arizona.
All climate data is sourced from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite and model data. It provides monthly averages for temperature, precipitation, humidity, wind speed, and solar radiation.
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.
