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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.

October 2009fog near the East River in Allouez

Mouse-over the photo for the identity of the subject

Oct 31 October's mean temperatures ran about 3.2° F below average and precipitation was about 3 inches above average (5.16 inches compared to average of 2.17), with at least a trace of precipitation on 20 of the 31 days.
Oct 27

Another welcome bit of sunny skies today in Green Bay. The leaves of oaks, hickories and others are still colorful, but won't last long now. Here is a photo of a white oak/shagbark hickory canopy in UW-Green Bay's Cofrin Arboretum, and the edge of a forest with Hills oak and shagbark hickory. A definite indicator of the lateness of our season is the abrupt dropping of leaves by Acer platanoides (Norway maple). They often hold their leaves among the latest of our trees.

Oct 24 The bright Fall colors of Larix laricina (Tamarack) again, this time in Shawano County. Also, Ilex verticllata (common winterberry holly) fruits are bright red and very conspicuous now.
Oct 22 Larix laricina (Tamarack) is at peak Fall color in northeastern Wisconsin. This is one of my favorite sights of the year, and won't last long. Color was great today in Oconto and Forest Counties.
Oct 21 Green Bay received 0.65 inches of rain today
Oct 19 Our high temperature in Green Bay of 64° F was the warmest temperature of the month to date.
Oct 15 Tundra Swans are back on Green Bay in large numbers, Pensaukee, Oconto County (Tom Erdman).
Oct 13

A little welcome sunshine today in Green Bay. Carya ovata (shagbark hickory) is bright yellow now on UW-Green Bay.

Lots of "Phuture Phoenix" fifth-graders getting a look at college life today at UW-Green Bay.

Looking east from the entrance to Mary Ann Cofrin Hall.

Oct 12 A little warmer this morning with about 35° in Green Bay, but another low of 20° in Lakewood (Oconto County).
Oct 11 Green Bay fell to 27° F. The coldest I saw for northeastern Wisconsin was 20° at Lakewood and 21° at Minoqua and Antigo. These temperatures are about 20 degrees below the "normal" for this time of year.
Oct 10

Green Bay's low temperature this morning was 28° F, our coldest of the season to date. Rhinelander to 24° F. In northwestern Marinette County this morning water standing in shallow containers was frozen completely through, up to about 2 inches thick. There was prominent frost on the plants, as here on this Rubus idaeus (red raspberry). There was a little snow on the ground a little to the west in Forest County, lasting well into the afternoon.

Fall leaf color is well along in northeastern Wisconsin, and in some areas leaves are falling rapidly. Still good color locally and some larger contiguous forests have considerable green where sheltered within the canopy. Larix laricina (Tamaracks) are beginning to turn color too--one of my favorites.

Oct 9 Cold air moves into Wisconsin, with a morning low temperature of 23° F in Rhinelander (about 100 miles NW of Green Bay). Green Bay fell only to 34 F, but the forecast is for colder air over the next few days.
Oct 5 Fraxinus pennsylvanica (green ash) is in its normal Fall color phase now in Green Bay.
Oct 1

First day of frost at my home, although much of the rest of our area had frost yesterday. In this photo you can see the crystaline structure of the frost on a grass leaf. The frost was followed by a fog.

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Last updated on October 6, 2014