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Sun Prairie, Wisconsin USA
43.18336 -89.21365 - Station Elevation 1007'

Updated: 26-Nov-2025 2:35am

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Daily Degree Days (65°F Base)

Report for Year 2025

Data last updated 11/26/2025 02:35 AM.

Other Years:

Day	Heating Degree Days												Cooling Degree Days
Day	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
1	40.5	40.2	43.8	31.0	16.2	4.8	0.0	0.0	2.3	0.4	25.1	---	0.0	0.0	0.0	0.0	0.0	0.0	8.6	0.2	0.0	0.0	0.0	---
2	42.5	31.9	40.9	19.6	15.1	0.0	0.0	0.0	0.0	0.0	24.5	---	0.0	0.0	0.0	0.0	0.0	3.7	11.4	1.9	0.0	1.0	0.0	---
3	48.7	33.1	27.7	22.5	18.4	0.0	0.0	0.0	4.1	0.0	17.7	---	0.0	0.0	0.0	0.0	0.0	6.1	14.2	3.2	0.0	6.5	0.0	---
4	53.5	48.8	21.8	23.3	11.8	0.6	0.0	0.0	11.9	0.0	17.1	---	0.0	0.0	0.0	0.0	0.0	0.0	13.0	4.0	0.0	7.4	0.0	---
5	54.2	44.8	32.2	22.4	9.9	0.0	0.0	0.0	9.8	0.0	17.2	---	0.0	0.0	0.0	0.0	0.0	2.0	13.4	5.9	0.0	5.2	0.0	---
6	46.6	37.5	35.4	24.6	1.1	0.0	0.0	0.0	11.6	4.1	21.0	---	0.0	0.0	0.0	0.0	0.0	3.4	8.0	8.0	0.0	0.0	0.0	---
7	49.0	45.8	32.2	29.2	5.1	0.0	0.0	0.0	12.2	8.2	16.3	---	0.0	0.0	0.0	0.0	0.0	3.4	4.4	12.3	0.0	0.0	0.0	---
8	51.8	39.6	29.4	33.1	13.1	0.2	0.0	0.0	7.3	15.6	28.4	---	0.0	0.0	0.0	0.0	0.0	0.0	8.5	14.9	0.0	0.0	0.0	---
9	45.3	45.0	19.9	25.4	9.8	5.4	0.0	0.0	2.6	14.0	37.6	---	0.0	0.0	0.0	0.0	0.0	0.0	7.8	12.0	0.0	0.0	0.0	---
10	39.6	45.8	14.0	27.9	2.4	2.1	0.0	0.0	0.7	8.2	39.0	---	0.0	0.0	0.0	0.0	0.0	0.0	5.0	6.3	0.0	0.0	0.0	---
11	38.9	52.0	22.1	22.5	5.8	0.0	0.0	0.0	0.0	12.4	30.8	---	0.0	0.0	0.0	0.0	0.0	8.2	5.3	9.0	0.3	0.0	0.0	---
12	39.5	52.6	25.1	15.8	0.0	0.0	0.0	0.0	0.0	8.8	21.7	---	0.0	0.0	0.0	0.0	2.3	1.0	7.7	8.2	1.2	0.0	0.0	---
13	55.4	56.7	19.6	10.1	0.0	2.4	0.0	0.0	0.0	6.3	23.0	---	0.0	0.0	0.0	0.0	2.0	0.0	5.6	5.7	3.4	0.0	0.0	---
14	57.9	53.6	4.7	12.3	0.0	0.0	0.0	0.0	0.0	11.3	13.8	---	0.0	0.0	0.0	0.0	3.8	1.7	9.8	6.6	4.7	0.0	0.0	---
15	52.7	42.1	17.9	21.6	0.0	0.0	0.0	0.0	0.0	13.6	8.8	---	0.0	0.0	0.0	0.0	6.3	4.0	12.2	10.5	5.1	0.0	0.0	---
16	35.7	48.4	32.9	23.2	0.0	0.0	0.0	0.0	0.0	8.3	26.7	---	0.0	0.0	0.0	0.0	2.9	6.5	9.4	7.0	5.0	0.0	0.0	---
17	29.3	66.0	25.0	15.2	10.3	0.0	1.9	0.0	0.0	0.0	28.8	---	0.0	0.0	0.0	0.0	0.0	11.7	0.0	5.3	5.7	0.0	0.0	---
18	45.9	67.6	16.9	7.1	10.9	0.0	0.0	0.0	0.0	0.6	29.1	---	0.0	0.0	0.0	0.0	0.0	3.3	1.3	5.2	6.5	0.0	0.0	---
19	66.1	61.9	30.5	15.8	19.2	0.0	0.0	0.0	0.0	14.6	29.4	---	0.0	0.0	0.0	0.0	0.0	7.0	9.6	5.9	4.7	0.0	0.0	---
20	69.2	52.9	33.6	19.9	20.7	0.0	0.0	0.0	0.0	13.6	21.9	---	0.0	0.0	0.0	0.0	0.0	10.8	5.5	4.7	2.3	0.0	0.0	---
21	71.5	49.0	21.8	16.9	19.3	0.0	0.0	0.0	0.0	20.3	27.6	---	0.0	0.0	0.0	0.0	0.0	18.3	4.3	1.6	2.4	0.0	0.0	---
22	52.2	45.4	30.2	12.5	14.2	0.0	0.0	0.0	0.0	20.7	28.9	---	0.0	0.0	0.0	0.0	0.0	20.2	8.8	5.2	1.5	0.0	0.0	---
23	54.5	35.6	27.3	5.6	10.8	0.0	0.0	0.0	0.0	23.6	24.3	---	0.0	0.0	0.0	0.0	0.0	15.4	13.0	3.3	0.1	0.0	0.0	---
24	56.0	21.2	30.0	4.6	10.1	0.0	0.0	4.8	5.1	25.6	23.0	---	0.0	0.0	0.0	0.0	0.0	8.9	12.4	0.0	0.0	0.0	0.0	---
25	40.6	23.6	29.9	17.9	8.0	0.0	0.0	7.0	3.9	23.8	20.0	---	0.0	0.0	0.0	0.0	0.0	8.2	9.5	0.0	0.0	0.0	0.0	---
26	45.2	26.0	24.0	17.0	7.4	0.0	0.0	4.8	0.0	16.7	3.0	---	0.0	0.0	0.0	0.0	0.0	12.3	8.9	0.0	0.7	0.0	0.0	---
27	36.2	27.3	16.2	11.3	2.9	0.0	0.0	2.3	0.0	19.8	---	---	0.0	0.0	0.0	0.0	0.0	7.9	14.8	0.0	3.2	0.0	---	---
28	29.4	24.8	4.7	0.0	8.8	0.0	0.0	0.6	0.8	19.6	---	---	0.0	0.0	0.0	1.7	0.0	7.8	16.0	0.0	0.0	0.0	---	---
29	28.9		18.1	4.9	5.6	0.0	0.0	5.9	0.0	19.9	---	---	0.0		0.0	0.0	0.0	12.8	13.8	0.0	2.8	0.0	---	---
30	26.4		29.6	14.0	1.8	0.0	0.0	2.3	0.0	23.2	---	---	0.0		0.0	0.0	0.0	10.0	3.2	0.0	3.0	0.0	---	---
31	29.9		30.3		5.4		0.0	3.8		22.6		---	0.0		0.0		0.0		0.8	0.0		0.0		---

	Heating Degree Days												Cooling Degree Days
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
High	71.5	67.6	43.8	33.1	20.7	5.4	1.9	7.0	12.2	25.6	39.0	---	0.0	0.0	0.0	1.7	6.3	20.2	16.0	14.9	6.5	7.4	0.0	---
Avg	46.2	43.5	25.4	17.6	8.5	0.5	0.1	1.0	2.4	12.1	23.3	---	0.0	0.0	0.0	0.1	0.6	6.5	8.6	4.7	1.8	0.7	0.0	---
Low	26.4	21.2	4.7	0.0	0.0	0.0	0.0	0.0	0.0	0.0	3.0	---	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	---


Color Key
< 5.0	5.0 - 10.0	10.0 - 15.0	15.0 - 20.0	20.0 - 25.0	25.0 - 30.0	30.0 - 35.0	35.0 - 40.0	40.0 - 45.0	45.0 - 50.0	50.0 - 55.0	55.0 - 60.0	60.0>

A Degree Day is a unit of measurement equal to a difference of one degree between the mean outdoor temperature and a reference temperature (65°F). Degree Days are used in estimating the energy needs for heating or cooling a building.

Script Developed by Murry Conarroe of Wildwood Weather.