The pressure in Seattle, WA is expected to rise in the coming hours. Over the next 72 hours, the pressure will climb to a high of 30.08 inHg on Saturday at around 7pm and then reach a low of 29.58 inHg on Monday at around 8am. The average pressure for this period will be 29.85 inHg, which is considered to be within the normal range. The average daily total fluctuation is 0.34 inHg, which is the sum of all the pressure changes from hour to hour in a single day (24-hour period) divided by the number of days shown. Compared to fluctuations in cities around the world, the daily (intraday) fluctuation forecasted in Seattle, WA is quite typical. The average daily range, which is the average difference between the highest and lowest pressures within each 24-hour window, is 0.3 inHg. Compared to the daily ranges in other human-inhabited places, this is quite wide, which means that the pressure is more volatile here. (Note that this metric is based on daily ranges, so sometimes the multi-day variance can be much larger than is described, especially at higher latitudes.)