Today's barometric pressure in Rockford, a 48-hour pressure chart, and a risk score for weather-triggered migraine and headache, based on pressure drops, humidity, and temperature changes.
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Rockford sits on the Rock River in far northern Illinois, close enough to the Wisconsin line to catch the colder side of most winter systems. Baseline pressure near 989 hPa at 218 metres, with swings to 14 hPa through the cold season.
Worst season for migraines: February, March and December. Northern Illinois sits on the rain-snow boundary for many winter storms, and small shifts in track determine which side the city lands on. That uncertainty makes the barometric pattern here less predictable than either Chicago to the east or the corn belt to the south.
Common triggers in Rockford: rain-snow boundary uncertainty, Arctic outbreak temperature contrasts, occasional lake-enhanced precipitation. Far enough inland to miss Lake Michigan's moderation but close enough for occasional lake-enhanced precipitation, Rockford occupies an in-between position. Arctic outbreaks reach this latitude with more force than they do further south, and the temperature contrast when they arrive drives some of the sharper pressure rises in the region.
Typical pressure: Rockford averages 989 hPa at rest, measured at the city's own elevation rather than corrected to sea level, and storm systems can push readings down to 972 hPa. Swings of 6-14 hPa over 24 hours are common during active weather and fall within the range most associated with pressure-triggered migraines.
2026 index: Rockford is not one of the 100 metros ranked in our 2026 U.S. Migraine Risk Index, which shows how they compare.
Can Rockford weather trigger migraines?
Yes. Rockford experiences 6-14 hPa barometric pressure swings, and research shows pressure drops are one of the most common migraine triggers. The city's specific patterns include rain-snow boundary uncertainty, Arctic outbreak temperature contrasts, occasional lake-enhanced precipitation.
What time of year are migraines worst in Rockford?
In Rockford the most barometrically volatile stretch of the year falls in February, March and December. That is when weather is most likely to play a part, if weather is a trigger for you at all. See when migraine weather season starts across the U.S.
Is there a barometric pressure headache forecast for Rockford?
This page works as one. Many people call a headache that arrives with a weather change a barometric pressure headache, and this forecast tracks the pressure drops, humidity and temperature swings behind that idea. The score covers the next 24 hours in Rockford and the chart shows the next 48. It is built on migraine research, so treat it as a rough guide for other headaches. A sudden, severe headache needs urgent medical care, whatever the weather.
Your own forecast
This page shows the weather risk for everyone in Rockford. The MigrAid app learns yours. It saves the barometric pressure, humidity and temperature with every migraine you log, shows whether Rockford's swings really line up with your attacks, and alerts you when conditions match your own trigger history.