Monthly climate guide
Siena weather in July
With highs near 32°C (90°F) and lows around 18°C (65°F), July feels very hot in Siena. Rainfall averages about 37 mm (fairly dry) and the sky is mostly sunny. Daytime highs are 4°C warmer than June and about the same as August.
What stands out in July
- July is Siena's second warmest month.
- It's one of the sunniest months here, with cloud cover around 30%.
- Siena is usually about 3°C warmer than Florence, 50 km away, in July.
- Expect a big gap between day and night — about 14°C.
Avg high
32°C
90°F
Avg low
18°C
65°F
Rainfall
37 mm
fairly dry
Humidity
55%
relative
Sky
30%
cloud · mostly sunny
Siena weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 9°C / 48°F | 1°C / 34°F | 54 mm | 88% | 65% |
| February | 10°C / 50°F | 1°C / 34°F | 72 mm | 85% | 64% |
| March | 14°C / 57°F | 4°C / 38°F | 69 mm | 80% | 58% |
| April | 18°C / 65°F | 7°C / 44°F | 53 mm | 76% | 60% |
| May | 22°C / 71°F | 10°C / 50°F | 61 mm | 71% | 61% |
| June | 28°C / 83°F | 15°C / 59°F | 37 mm | 61% | 41% |
| July | 32°C / 90°F | 18°C / 65°F | 37 mm | 55% | 30% |
| August | 33°C / 91°F | 18°C / 65°F | 33 mm | 55% | 28% |
| September | 27°C / 80°F | 14°C / 58°F | 60 mm | 66% | 47% |
| October | 21°C / 70°F | 10°C / 50°F | 84 mm | 77% | 56% |
| November | 15°C / 58°F | 6°C / 43°F | 100 mm | 87% | 66% |
| December | 11°C / 51°F | 2°C / 36°F | 64 mm | 89% | 61% |
What to pack for July
- Light, breathable clothing (cotton or linen)
- A sun hat and high-SPF sunscreen
- A refillable water bottle
- An extra layer — evenings are noticeably cooler than afternoons
- A small travel umbrella, just in case
- Sunglasses
Is July a good time to visit Siena?
Compare the months in the chart above to find your ideal window.
Best time to visit Siena →Other Italy cities in July
Cite or embed this data
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Siena weather in July. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/italy/siena/july
<a href="https://weathercompare.eu/weather/italy/siena/july">Siena weather in July</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/italy/siena" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Siena weather in July"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/italy/siena/july">Siena weather in July</a> – WeatherCompare</p>
Siena in July: quick answers
Is July a good time to visit Siena?
It can be, if you like heat: July highs in Siena are around 32°C. Good for the beach; plan sightseeing for early morning and evening.
How warm is Siena in July?
Average highs are about 32°C (90°F) and average lows about 18°C (65°F), based on 10 years of daily data.
Does it rain a lot in Siena in July?
Siena typically gets around 37 mm of rain in July — fairly dry.
Figures are long-term averages for the area around Siena (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.