Last updated: July 31, 2025
Under the Köppen–Geiger climate classification Saint-Just features a oceanic climate (Cfb). Temperatures typically range between 4 °C (40 °F) and 21 °C (71 °F) through the year, but rarely can drop to -10 °C (15 °F) or can rise to as high as 41 °C (106 °F). The average annual precipitation amounts to about 801 mm (31.5 inches) and receives 131 rainy days on the 1 mm (0.04 inches) threshold annually. Saint-Just enjoys an average of 3544 hours of sunshine throughout the year, and daylight varies from 8 hours 32 minutes to 15 hours 49 minutes per day.
The warmest months in Saint-Just are June, July and August, with daily mean temperatures ranging from 20 to 21 °C (68 - 71 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 4 to 7 °C (40 - 44 °F) throughout the day. On average each year, Saint-Just experiences 62 days above 25 °C (77.0 °F) and 34 days below 0 °C (32.0 °F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum | 16°C (61°F) | 22°C (72°F) | 24°C (76°F) | 28°C (83°F) | 31°C (89°F) | 39°C (102°F) | 41°C (106°F) | 37°C (100°F) | 36°C (97°F) | 29°C (84°F) | 22°C (71°F) | 17°C (63°F) |
| Mean maximum | 14°C (57°F) | 18°C (65°F) | 22°C (72°F) | 25°C (78°F) | 28°C (82°F) | 33°C (91°F) | 35°C (96°F) | 35°C (96°F) | 31°C (89°F) | 26°C (80°F) | 19°C (67°F) | 15°C (60°F) |
| Average high | 7°C (45°F) | 11°C (52°F) | 14°C (57°F) | 17°C (63°F) | 20°C (68°F) | 25°C (77°F) | 27°C (81°F) | 27°C (80°F) | 24°C (75°F) | 18°C (64°F) | 12°C (53°F) | 9°C (48°F) |
| Daily mean | 4°C (40°F) | 7°C (44°F) | 9°C (48°F) | 12°C (53°F) | 15°C (59°F) | 20°C (68°F) | 21°C (71°F) | 21°C (70°F) | 18°C (64°F) | 13°C (56°F) | 8°C (46°F) | 6°C (43°F) |
| Average low | 2°C (35°F) | 3°C (37°F) | 4°C (40°F) | 6°C (43°F) | 10°C (50°F) | 14°C (57°F) | 16°C (60°F) | 15°C (60°F) | 12°C (54°F) | 9°C (49°F) | 5°C (41°F) | 4°C (39°F) |
| Mean minimum | -4°C (25°F) | -4°C (25°F) | -3°C (27°F) | -1°C (30°F) | 3°C (38°F) | 9°C (48°F) | 11°C (52°F) | 9°C (49°F) | 6°C (44°F) | 3°C (37°F) | -2°C (29°F) | -3°C (27°F) |
| Minimum | -8°C (17°F) | -8°C (19°F) | -10°C (15°F) | -3°C (27°F) | 0°C (33°F) | 7°C (44°F) | 9°C (49°F) | 7°C (45°F) | 5°C (41°F) | 0°C (33°F) | -4°C (26°F) | -4°C (26°F) |
Compare temperature, precipitation, sunshine, UV index in Saint-Just, France with other places around the world.
Saint-Just usually has the most precipitation in May, October and December, with an average of 14 rainy days and 88 mm (3.5 inches) of precipitation per month. The driest months in Saint-Just are April, July and August. On average, 45 mm (1.8 inches) of precipitation falls during these months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average precipitation mm (inches) | 70 (2.7) | 64 (2.5) | 73 (2.9) | 43 (1.7) | 75 (3.0) | 63 (2.5) | 51 (2.0) | 41 (1.6) | 61 (2.4) | 74 (2.9) | 70 (2.8) | 116 (4.6) |
| Average precipitation days (≥ 1 mm) | 12 | 12 | 13 | 7 | 13 | 10 | 7 | 7 | 7 | 13 | 12 | 18 |
The sunniest months in Saint-Just are May, June and July, when the sun shines an average of 13 hours 11 minutes a day. Least sunny months in Saint-Just: January, November and December receive an average of 5 hours 30 minutes of sunshine daily.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean monthly sunshine hours | 127 | 211 | 274 | 352 | 387 | 407 | 419 | 386 | 331 | 267 | 208 | 170 |
| Mean daily daylight hours | 8h 57m | 10h 17m | 11h 56m | 13h 38m | 15h 5m | 15h 49m | 15h 26m | 14h 8m | 12h 30m | 10h 49m | 9h 19m | 8h 32m |
Saint-Just experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 8 - 9, which corresponds to the Very High category of sun exposure. January, November and December are in the Low exposure category. In these months, the maximum values of the UV index do not exceed 2. For more detailed information, check out our hourly Saint-Just UV Index data.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV Index (month maximum) | 2 | 3 | 5 | 6 | 8 | 9 | 9 | 8 | 6 | 4 | 2 | 1 |