This report describes the typical weather at the Austin Straubel International Airport (Green Bay, Wisconsin, United States) weather station over the course of an average September 9. It is based on the historical records from 1974 to 2012. Earlier records are either unavailable or unreliable.
Green Bay, Wisconsin has a humid continental climate with warm summers and no dry season. The area within 25 mi of this station is covered by grasslands (47%), croplands (41%), oceans and seas (8%), and built-up areas (3%).
The temperature typically varies from 55°F to 71°F and is rarely below 44°F or above 81°F.
The coolest hours of the day are from 1am to 8am with the coldest at 6am, at which time the temperature is below 60°F three days out of four.
The warmest hours of the day are from 11am to 7pm with the hottest at 3pm, at which time the temperature is above 66°F three days out of four.
The day has gained half its heat by 10am and lost it again by 8pm.
On September 9 the Sun rises at 6:25am and sets at 7:13pm.
Solar noon is at 12:49pm.
For reference, on the longest day of the year the Sun rises at 5:07am and sets at 8:41pm, while on the shortest day of the year it rises at 7:26am and sets at 4:15pm.
Astronomical twilight begins and ends 101 minutes before sunrise and after sunset at 4:43am and 8:54pm, respectively.
Nautical twilight begins and ends 64 minutes before sunrise and after sunset at 5:20am and 8:18pm, respectively.
Civil twilight begins and ends 29 minutes before sunrise and after sunset at 5:55am and 7:43pm, respectively.
Solar twilight begins and ends 38 minutes after sunrise and before sunset at 7:03am and 6:35pm, respectively.
The median cloud cover ranges from 29% (mostly clear) to 59% (partly cloudy).
At 1am, the clearest time of the day, the sky is clear, mostly clear, or partly cloudy 64% of the time, and overcast or mostly cloudy 36% of the time.
At 1pm, the cloudiest time of the day, the sky is overcast, mostly cloudy, or partly cloudy 56% of the time, and clear or mostly clear 44% of the time.
The sky is typically clearing in earnest by 7pm.
The clouds have typically started forming in earnest by 7am.
There is a 44% chance that precipitation will be observed at some point during the day.
The average measured liquid-equivalent quantity of precipitation is 0.091". Among only those days for which there is at least some measured precipitation, the average is 0.288" and the total rarely exceeds 0.681".
When precipitation does occur it is most often in the form of slight rain (35% of days with precipitation have at worst slight rain), moderate rain (34%), and thunderstorms (23%).
Precipitation is most likely around 7am and least likely around 1pm.
Either snow is exceptionally unlikely to fall at this location on September 9 or this station does not reliably report precipitation types.
The relative humidity typically ranges from 59% (mildly humid) to 89% (very humid), rarely dropping below 41% (comfortable), or exceeding 98% (very humid).
The air is driest at 3pm, at which time the relative humidity is less than 70% (mildly humid) three days out of four; it is most humid at 5am, exceeding 85% (very humid) three days out of four.
The dew point ranges from 52°F to 56°F with an average of 54°F.
For reference, comfortable indoor conditions should have a relative humidity between 30% and 50% with a dew point of less than 65°F.
Sustained wind speeds typically vary from 6 mph to 11 mph (light breeze to gentle breeze) over the course of the day.
The peak sustained wind speed typically occurs around 2pm and is rarely outside the range 5 mph to 17 mph (light breeze to moderate breeze).
The wind is most calm around 5am, rarely exceeding 11 mph (gentle breeze).
The wind is most often out of the south west (17% of the time), south (16% of the time), west (14% of the time), north (11% of the time), and north west (10% of the time).