Barometric Pressure in Jefferson, United States 
1010.9 hPa
18.3 ℃
97%
1.97 m/s
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The average pressure in Jefferson, Wisconsin, United States today is , which is considered normal. Pressure is trending rising.
Weather prediction: Fine, possible showers
Rapid Pressure Changes
Rapid pressure changes detected in Jefferson, often a sign of approaching weather shifts. See the forecast chart or get pressure alerts.
- Rapid Fall : ()
The daily total fluctuation in pressure in Jefferson is , with a low of and a high of .
Forecast
Hourly Pressure Trends
Track the barometric pressure in Jefferson hour by hour across the next 6 hourly readings.
Jefferson sits inland in southeastern Wisconsin, where weather systems often move through quickly. Low-pressure systems commonly bring thicker clouds, wind, rain, or snow. Rising pressure behind them often signals clearing skies. High pressure can bring calm, dry weather for several days, though nearby systems can change conditions fast.
Broad, gently rolling land around the Rock River offers little shelter from passing winds, so fronts can cross with few barriers. The Great Lakes add influence, especially in cooler months, but local weather mostly reflects large air masses arriving from the west or northwest.
Winter brings frequent snow, icy periods, and sharp cold spells, while spring warms unevenly and often turns wet as snow melts and rain systems pass. Summers are warm and humid, with showers or thunderstorms at times. Autumn cools gradually, and changing winds bring crisp days before winter returns.