Guidonia Montecelio vs Siena Climate
94%matchGuidonia Montecelio vs Siena: a 94% climate match. Compared with Guidonia Montecelio, Siena has the same winter lows and 6°F (4°C) cooler summer days.
Guidonia Montecelio gets 32 in (823 mm) of rain a year and Siena 30 in (755 mm). August is the warmest month in both, with highs of 93°F (34°C) in Guidonia Montecelio and 86°F (30°C) in Siena.
Climate fingerprints: ring color = average temperature, thickness = rain. January at the top.
Month by month
Highs and lows (°F)
Guidonia MontecelioSienasolid = high, dashed = low
Rain (in per month)
Guidonia MontecelioSiena
Monthly averages
| Month | High | Low | Rain | |||
|---|---|---|---|---|---|---|
| Guidonia Montecelio | Siena | Guidonia Montecelio | Siena | Guidonia Montecelio | Siena | |
| Jan | 55°F(13°C) | 49°F(10°C) | 38°F(3°C) | 37°F(3°C) | 3.0 in(75 mm) | 2.1 in(54 mm) |
| Feb | 57°F(14°C) | 52°F(11°C) | 38°F(4°C) | 38°F(3°C) | 2.7 in(69 mm) | 2.4 in(60 mm) |
| Mar | 62°F(17°C) | 58°F(14°C) | 43°F(6°C) | 42°F(6°C) | 2.6 in(65 mm) | 2.0 in(51 mm) |
| Apr | 68°F(20°C) | 65°F(18°C) | 49°F(9°C) | 47°F(9°C) | 2.4 in(61 mm) | 2.3 in(59 mm) |
| May | 77°F(25°C) | 73°F(23°C) | 56°F(13°C) | 54°F(12°C) | 2.2 in(57 mm) | 2.2 in(57 mm) |
| Jun | 86°F(30°C) | 80°F(27°C) | 63°F(17°C) | 60°F(16°C) | 1.6 in(40 mm) | 1.9 in(47 mm) |
| Jul | 92°F(33°C) | 86°F(30°C) | 67°F(19°C) | 64°F(18°C) | 0.9 in(23 mm) | 1.1 in(27 mm) |
| Aug | 93°F(34°C) | 86°F(30°C) | 68°F(20°C) | 65°F(18°C) | 1.0 in(26 mm) | 1.1 in(29 mm) |
| Sep | 83°F(28°C) | 77°F(25°C) | 61°F(16°C) | 58°F(15°C) | 3.1 in(78 mm) | 2.6 in(66 mm) |
| Oct | 73°F(23°C) | 68°F(20°C) | 54°F(12°C) | 53°F(12°C) | 4.0 in(101 mm) | 3.7 in(94 mm) |
| Nov | 63°F(17°C) | 58°F(15°C) | 47°F(8°C) | 47°F(8°C) | 4.9 in(124 mm) | 5.0 in(127 mm) |
| Dec | 56°F(13°C) | 50°F(10°C) | 40°F(5°C) | 39°F(4°C) | 4.1 in(104 mm) | 3.3 in(84 mm) |
1991–2020 averages, by calendar month.