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Observations by Gary Fewless for Green Bay WI (Lat.N 44.51° Long. W 88.02° ), except as noted. For flowers lacking conspicuous petals or sepals I define "anthesis" as release of pollen by mature anthers.

January 2011 Mouse-over the photo for the identity of the subject
snow in prairie, UW-Green Bay Cofrin Arboretum

Jan 31 Green Bay received another 3.9 inches of snow today. In summary, we had 19.1 inches of snow for the month and the average temperature was about 1.7 degrees below normal. The temperature did not rise above freezing over the last 30 days of the month (28 was the highest during this period on Jan. 12).
Jan 30 Another big snowstorm is moving across the midwest, already in southern Minnesota and southwestern Wisconsin by 10:00 a.m. today. It will bring snow beginning today and extending through the next two days, with a blizzard watch for southeastern Wisconsin on Wednesday.
Jan 28 Green Bay received 2.5 inches of snow today (plus 0.3 at the end of the previous day and 0.2 into the next day for a total of 3.0 inches for this event). This brings our on-ground depth back to 10 inches.
Jan 26 Yesterday and today the New York City area had another big snowstorm. The national media is reporting 15-19 inches of snow in that area with widespread driving hazards and cancellation of many flights from the local airports.
Jan 24

The overnight low in Green Bay was -2° F, making this the 6th consecutive day for which the low temperature fell below 0. Warmer air moved in early and the temperature rose to 18° by 9 a.m. It is also our 23rd consecutive day that the temperature has stayed continuously below freezing (32° F), and we've had only 8 days rise above freezing since November 30. One of the things I really admire about this part of the world is the way in which people just take the weather in stride, and many even revel in the winters.

Jan 21

Green Bay's low temperature this morning was -15° F, and it is still -2° F at 11 am and the "wind chill" is -16. This certainly qualifies as our coldest day of this winter so far, with both the lowest low (-15) and the lowest high (+4°).

Rhinelander, 100 miles NW had a low of -23° F today.

One month after the shortest daylight of the winter in Green Bay on Dec 21 the daylength has increased by 34 min 45 sec, and is increasing by about 2 minutes/day. Notice in the data below that most of the increase in daylength has been in the later sunset times. Sunrise is only about 4 minutes earlier than on Dec 21.

Dec 21: sunrise: 7:25 sunset 4:15 (8 hrs 49 min 30 sec)
Jan 21: sunrise: 7:21 sunset 4:46 (9 hrs 24 min 15 sec)

On Dec 21 the noon sun was at its lowest angle of the year, 22.1°. Today it will be at 25.7° at noon. At its high point on June 21 the angle will be 68.9°.

Jan 20 The cold weather persists with today's high reaching only 11° F after the morning low of -9. Snow depth of 10 inches is reported at the Green Bay National Weather Service station.
Jan 19 A cold night with temperatures in single digits (and falling to -9° F by the next morning) and a great night for a walk with a bright clear full moon.
Jan 18

Here's a comparison of a mostly white oak canopy on UW-Green Bay's Cofrin Arboretum, comparing July 7 with today, January 18.

Here's a photo of a fruit of Robinia pseudoacacia (black locust), that obviously fell after yesterday's snowfall. Notice the seeds still inside the "pod". It may not apply to this species, but clearly some of our trees, such as those of Betula papyrifera (white birch), drop seeds from Fall through Winter and the small, winged seeds can be seen to disperse by blowing along the surface of crusted snow. white birch fruit

Jan 17

Another 3.1 inches of snow in Green Bay. All things considered, I'd rather mow the lawn.

Jan 16

No snow today, but as often happens, the departing low pressure system drew in some cold arctic air behind it. The morning low temperature was -5.0° F. and the high temperature rose only to 15°.

The low point of the winter cold period in Green Bay as judged by average highs and lows for each date, lies somewhere between January 14 and 18, and the 16th seems to be a reasonable compromise. The day length reached a minimum on December 21, but the temperature lags behind for about 3-4 weeks in our area. If the averages are rounded to the nearest degree, the "normal" daily highs reach their lowest at 23° F from Jan 14-15, and the "normal" lows fall to 6° F from Jan 15 through 18. Another way to look at it is to consider the lowest daily average temperautre (high+low)/2. That statistic reaches a minimum of 27 from Jan. 9-23, the mid-point being Jan 16. We might also consider the week centered on Jan 16 (Jan 13-19) as the coldest week of the winter, at least as averages go.

Jan 15 Another inch of snow in Green Bay and the low temperature was 0° F.
Jan 14 Green Bay received 2.2 inches of snow; 3.0 inches in Rhinelander.
Jan 13 Contrary to the recent emphasis on snow in normally warm places (Jan 10, 11), the preliminary data indicates that when taking the entire planet into consideration, the year 2010 was tied for the warmest year on record. Even more unsettling is the fact that 2005 is the year with which it shares the record, and the 9 warmest years on record have occurred in the last 10 years! The data is from the National Oceanic and Atmospheric Administration.
Jan 12

Green Bay weather has been about normal for this time of year with highs in the 20's and lows in teens or single digits. Much of the rest of the country cannot say the same--see below.

As a result of the snow storm in the southeastern U.S.A.(see entries for January 10 and 11) the national media is reporting that there is now snow on the ground in 49 of the 50 U.S. states. I f you guessed Hawaii as the exception, recall that they have mountains with sometimes-snowy tops. Florida is the exception.

Just as a reminder for someone reading this in the future, Australia is currently experiencing severe and widespread flooding in Queensland and has been for some time.

Jan 11

Green Bay received 2.8 inches of snow today, beginning before daylight and continuing through the day. Snow cover had fallen to about 3 inches. This snow raised it to about 6 inches and it is a welcome addition for outdoor sports fans.

Green Bay's temperature has not risen above 26° F since Jan 1, and the warmest daily low temperature so far this month was 18°. That is about average for this locality (1° below "normal").

The large winter storm in the southeast described here yesterday has swung to the north and will be in part the source of another large snow event in the northeast. Louisiana, Alabama, Georgia and the Carolinas were designated as states of emergency as very cold air slides in to the south behind the snowstorm.

Jan 10 An unusually cold weather system swept across the southeastern U.S.A. yesterday and today (Jan 9 and 10) Leaving a trail of snow and ice in places that don't normally see significant snow. The storm swept from Arkansas, through the gulf states and to the Carolinas. Highlights included 4-7 inches in Atlanta, Georgia and up to 13 inches in parts of Tennessee. Of course many travel plans were interrupted including many cancelled flights from the Atlanta Airport.
Jan 4 With most of our previous snow cover gone, the light snow of last night was not enough to cover the activities of small rodents--what would have been tunnels are now exposed.
Jan 1

The month begins with a high temperature of 42° F. The warm days at the end of December have reduced the snow cover to about 2 inches and there are some conspicuous bare spots where the snow depth had been thinner.

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Last updated on May 20, 2015