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The average temperature in St. Peter over the whole year is 8°C. July is the hottest month, with highs of about 26°C; January is the coldest, with lows of about -10°C. St. Peter has no sharply defined rainy season: the chance of rain on a given day runs from 56% in January, the driest month, to 72% in July, the wettest. Winds in St. Peter are highest in April, averaging 4.8 m/s (17 km/h), and lightest in July, at 2.7 m/s (10 km/h). The prevailing wind is from the SW. The clearest skies in St. Peter come in July, when the sky is typically 26% covered; January is the cloudiest month, at 52%.
| Month | High | Low | Feels like | Chance of rain | Cloud | Wind | Being outside | Sun | Walking |
|---|---|---|---|---|---|---|---|---|---|
| January | -7°C | -10°C | -13°C | 56% | 52% | 4.1 m/s | 0 | 0 | 0 |
| February | -5°C | -9°C | -11°C | 59% | 41% | 4.3 m/s | 0 | 0 | 2 |
| March | 3°C | -2°C | -3°C | 65% | 46% | 4.5 m/s | 1 | 0 | 11 |
| April | 10°C | 3°C | 4°C | 69% | 49% | 4.8 m/s | 10 | 0 | 33 |
| May | 19°C | 11°C | 15°C | 72% | 40% | 4.0 m/s | 45 | 8 | 62 |
| June | 25°C | 18°C | 23°C | 71% | 32% | 3.7 m/s | 64 | 35 | 42 |
| July | 26°C | 19°C | 26°C | 72% | 26% | 2.7 m/s | 56 | 54 | 24 |
| August | 24°C | 17°C | 24°C | 71% | 33% | 2.7 m/s | 65 | 42 | 36 |
| September | 22°C | 13°C | 20°C | 69% | 31% | 3.1 m/s | 63 | 22 | 57 |
| October | 13°C | 6°C | 8°C | 68% | 39% | 3.8 m/s | 23 | 1 | 48 |
| November | 4°C | -1°C | -2°C | 62% | 43% | 4.2 m/s | 4 | 0 | 15 |
| December | -3°C | -6°C | -9°C | 60% | 51% | 4.2 m/s | 0 | 0 | 2 |
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Year round, St. Peter has days of about -7°C at their warmest in January, its coolest month, and 26°C in July, its warmest; the coolest hours of the day run from -10°C to 19°C through the year, and the average temperature over the year is 8°C around the clock. Rain is most likely around July and least likely around January. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Winter in St. Peter has typical daily highs of about -5°C and lows of about -9°C, with a 58% chance of rain on a given day.
Spring in St. Peter has typical daily highs of about 11°C and lows of about 4°C, with a 68% chance of rain on a given day.
Summer in St. Peter has typical daily highs of about 25°C and lows of about 18°C, with a 71% chance of rain on a given day.
Autumn in St. Peter has typical daily highs of about 13°C and lows of about 6°C, with a 66% chance of rain on a given day.
St. Peter has no sharply defined rainy season: the chance of rain on a given day runs from 56% in January, the driest month, to 72% in July, the wettest.
Winds in St. Peter are highest in April, averaging 4.8 m/s (17 km/h), and lightest in July, at 2.7 m/s (10 km/h). The prevailing wind is from the SW.
The average temperature in St. Peter over the whole year is 8°C. July is the hottest month, with highs of about 26°C; January is the coldest, with lows of about -10°C.