Guilford Weather Records (USC00173417)

Record envelope, standing records and threshold days for Guilford (USC00173417), Maine, United States, with 35 years of record.

Key Facts for Guilford

Guilford (USC00173417) is a weather station in Maine, United States at 45.17 latitude and -69.38 longitude, 122 m (400 ft) above sea level.
The station reports from 1978 to 2012, 35 years of record.
1,464 records set at Guilford still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Guilford set a daily record snowfall of 7.6 cm (3.0 in) on 29 March 2012.

About the Station

Location: Maine, United States, 45.17 latitude, -69.38 longitude.
Elevation: 122 m (400 ft).
Period of record: 1978 to 2012, 35 years.
Eligible elements: prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Guilford. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Guilford, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	15.6 C (60.1 F)	-36.7 C (-34.1 F)	n/a	n/a
Feb	12.2 C (54.0 F)	-28.9 C (-20.0 F)	n/a	n/a
Mar	28.3 C (82.9 F)	-28.3 C (-18.9 F)	n/a	n/a
Apr	32.2 C (90.0 F)	-10.0 C (14.0 F)	n/a	n/a
May	33.3 C (91.9 F)	-4.4 C (24.1 F)	n/a	n/a
Jun	35.0 C (95.0 F)	2.2 C (36.0 F)	n/a	n/a
Jul	33.3 C (91.9 F)	5.6 C (42.1 F)	n/a	n/a
Aug	33.9 C (93.0 F)	1.1 C (34.0 F)	n/a	n/a
Sep	33.9 C (93.0 F)	-2.8 C (27.0 F)	n/a	n/a
Oct	28.9 C (84.0 F)	-6.1 C (21.0 F)	n/a	n/a
Nov	18.9 C (66.0 F)	-16.7 C (1.9 F)	n/a	n/a
Dec	15.6 C (60.1 F)	-26.7 C (-16.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Guilford still stand. 2007 holds the most, with 255.

All-Time Record Progression

1 new records

1 all-time records were set at Guilford between 23 February 2009 and 23 February 2009. Each dot is a new record.

Wettest Day of Each Month

Sep: 90.2 mm (3.6 in)

The wettest day on record for each calendar month at Guilford. The most was 90.2 mm (3.6 in) on 17 September 1999.

Record daily precipitation for each month at Guilford
Month	Record daily precipitation (mm)	Date
Jan	66.5 mm (2.6 in)	28 January 1996
Feb	66.8 mm (2.6 in)	22 February 1996
Mar	57.9 mm (2.3 in)	10 March 1998
Apr	78.7 mm (3.1 in)	25 April 1983
May	65.5 mm (2.6 in)	30 May 1984
Jun	79.0 mm (3.1 in)	26 June 1984
Jul	84.8 mm (3.3 in)	14 July 1996
Aug	83.8 mm (3.3 in)	13 August 2004
Sep	90.2 mm (3.6 in)	17 September 1999
Oct	83.1 mm (3.3 in)	24 October 1981
Nov	86.1 mm (3.4 in)	16 November 2007
Dec	84.1 mm (3.3 in)	18 December 2000

Period of Record Coverage

2005 to 2012

8 years of record at Guilford, 2005 to 2012. 3 years have data for under 90 percent of days and are left out of rankings: 2005, 2006, 2012.

Latest Records

Latest records at Guilford
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
29 March 2012	Guilford, US	daily snowfall	7.6 cm (3.0 in)	3.8 cm (1.5 in)	7 years	9 of 100 (Routine)
25 February 2012	Guilford, US	daily snowfall	22.9 cm (9.0 in)	15.3 cm (6.0 in)	5 years	25 of 100 (Routine)
25 February 2012	Guilford, US	daily rain	27.9 mm (1.1 in)	11.6 mm (0.5 in)	17 years	21 of 100 (Routine)
28 January 2012	Guilford, US	daily snowfall	10.2 cm (4.0 in)	1.3 cm (0.5 in)	14 years	8 of 100 (Routine)
24 November 2011	Guilford, US	daily snowfall	12.7 cm (5.0 in)	3.8 cm (1.5 in)	13 years	14 of 100 (Routine)
24 November 2011	Guilford, US	daily rain	14.0 mm (0.6 in)	3.1 mm (0.12 in)	18 years	10 of 100 (Routine)
6 September 2011	Guilford, US	daily rain	29.0 mm (1.1 in)	6.9 mm (0.27 in)	16 years	13 of 100 (Routine)
5 September 2011	Guilford, US	daily rain	54.1 mm (2.1 in)	30.2 mm (1.2 in)	0 years	26 of 100 (Routine)
29 August 2011	Guilford, US	daily rain	78.2 mm (3.1 in)	54.6 mm (2.1 in)	32 years	52 of 100 (Notable)
28 May 2011	Guilford, US	daily rain	24.6 mm (1.0 in)	4.8 mm (0.19 in)	28 years	16 of 100 (Routine)
16 May 2011	Guilford, US	daily rain	30.7 mm (1.2 in)	19.8 mm (0.8 in)	29 years	34 of 100 (Routine)
21 April 2011	Guilford, US	daily snowfall	1.3 cm (0.5 in)	1.3 cm (0.5 in)	32 years	13 of 100 (Routine)
1 March 2011	Guilford, US	daily snowfall	15.2 cm (6.0 in)	7.6 cm (3.0 in)	5 years	13 of 100 (Routine)
26 February 2011	Guilford, US	daily snowfall (Tie)	12.7 cm (5.0 in)	tie	19 years	2 of 100 (Routine)
6 February 2011	Guilford, US	daily rain	25.7 mm (1.0 in)	1.8 mm (0.07 in)	9 years	7 of 100 (Routine)
3 February 2011	Guilford, US	daily snowfall	21.6 cm (8.5 in)	1.3 cm (0.5 in)	8 years	6 of 100 (Routine)
22 January 2011	Guilford, US	daily snowfall	17.8 cm (7.0 in)	7.6 cm (3.0 in)	32 years	22 of 100 (Routine)
27 December 2010	Guilford, US	daily rain	8.4 mm (0.33 in)	1.5 mm (0.06 in)	4 years	5 of 100 (Routine)
13 December 2010	Guilford, US	daily rain	61.5 mm (2.4 in)	22.1 mm (0.9 in)	27 years	31 of 100 (Routine)
18 November 2010	Guilford, US	daily rain	34.3 mm (1.4 in)	8.6 mm (0.34 in)	8 years	12 of 100 (Routine)

Extremes by Year

1978 to 2012

Yearly extremes at Guilford: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	35.0 C (95.0 F)	2005	33.3 C (91.9 F)	8
Coldest night (TNn)	-36.7 C (-34.1 F)	2009	-28.0 C (-18.5 F)	8
Wettest day (Rx1day)	90.2 mm (3.6 in)	1999	57.9 mm (2.3 in)	35
Wettest five days (Rx5day)	186.9 mm (7.4 in)	1984	87.9 mm (3.5 in)	35
Longest dry spell (CDD)	26 days	2010	15 days	35

Hottest day (TXx)

The hottest day of the year at Guilford, 1978 to 2012. The record is 35.0 C (95.0 F) in 2005, marked on the chart; the median year is 33.3 C (91.9 F).

Hottest day (TXx) at Guilford by year
Year	Hottest day (TXx)
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	n/a
2001	n/a
2002	n/a
2003	n/a
2004	n/a
2005	35.0 C (95.0 F)
2006	33.3 C (91.9 F)
2007	33.9 C (93.0 F)
2008	32.8 C (91.0 F)
2009	32.8 C (91.0 F)
2010	33.9 C (93.0 F)
2011	33.3 C (91.9 F)
2012	28.3 C (82.9 F)

Coldest night (TNn)

The coldest night of the year at Guilford, 1978 to 2012. The record is -36.7 C (-34.1 F) in 2009, marked on the chart; the median year is -28.0 C (-18.5 F).

Coldest night (TNn) at Guilford by year
Year	Coldest night (TNn)
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	n/a
2001	n/a
2002	n/a
2003	n/a
2004	n/a
2005	-22.8 C (-9.0 F)
2006	-20.6 C (-5.1 F)
2007	-28.9 C (-20.0 F)
2008	-28.9 C (-20.0 F)
2009	-36.7 C (-34.1 F)
2010	-23.3 C (-9.9 F)
2011	-27.8 C (-18.0 F)
2012	-28.3 C (-18.9 F)

Wettest day (Rx1day)

The wettest day of the year at Guilford, 1978 to 2012. The record is 90.2 mm (3.6 in) in 1999, marked on the chart; the median year is 57.9 mm (2.3 in).

Wettest day (Rx1day) at Guilford by year
Year	Wettest day (Rx1day)
1978	28.2 mm (1.1 in)
1979	66.3 mm (2.6 in)
1980	40.9 mm (1.6 in)
1981	83.1 mm (3.3 in)
1982	38.4 mm (1.5 in)
1983	78.7 mm (3.1 in)
1984	79.0 mm (3.1 in)
1985	41.1 mm (1.6 in)
1986	40.4 mm (1.6 in)
1987	77.2 mm (3.0 in)
1988	54.4 mm (2.1 in)
1989	43.4 mm (1.7 in)
1990	49.0 mm (1.9 in)
1991	60.5 mm (2.4 in)
1992	45.7 mm (1.8 in)
1993	42.9 mm (1.7 in)
1994	53.6 mm (2.1 in)
1995	45.2 mm (1.8 in)
1996	84.8 mm (3.3 in)
1997	42.4 mm (1.7 in)
1998	57.9 mm (2.3 in)
1999	90.2 mm (3.6 in)
2000	84.1 mm (3.3 in)
2001	34.3 mm (1.4 in)
2002	49.0 mm (1.9 in)
2003	54.9 mm (2.2 in)
2004	83.8 mm (3.3 in)
2005	74.9 mm (2.9 in)
2006	65.8 mm (2.6 in)
2007	86.1 mm (3.4 in)
2008	70.4 mm (2.8 in)
2009	61.5 mm (2.4 in)
2010	61.5 mm (2.4 in)
2011	78.2 mm (3.1 in)
2012	27.9 mm (1.1 in)

Wettest five days (Rx5day)

The wettest five days of the year at Guilford, 1978 to 2012. The record is 186.9 mm (7.4 in) in 1984, marked on the chart; the median year is 87.9 mm (3.5 in).

Wettest five days (Rx5day) at Guilford by year
Year	Wettest five days (Rx5day)
1978	45.0 mm (1.8 in)
1979	92.7 mm (3.6 in)
1980	80.3 mm (3.2 in)
1981	136.9 mm (5.4 in)
1982	67.4 mm (2.7 in)
1983	123.7 mm (4.9 in)
1984	186.9 mm (7.4 in)
1985	70.1 mm (2.8 in)
1986	67.8 mm (2.7 in)
1987	105.2 mm (4.1 in)
1988	67.9 mm (2.7 in)
1989	93.9 mm (3.7 in)
1990	85.1 mm (3.4 in)
1991	92.1 mm (3.6 in)
1992	70.3 mm (2.8 in)
1993	70.2 mm (2.8 in)
1994	85.6 mm (3.4 in)
1995	84.1 mm (3.3 in)
1996	110.8 mm (4.4 in)
1997	65.8 mm (2.6 in)
1998	111.0 mm (4.4 in)
1999	130.3 mm (5.1 in)
2000	127.6 mm (5.0 in)
2001	57.7 mm (2.3 in)
2002	68.1 mm (2.7 in)
2003	95.0 mm (3.7 in)
2004	100.8 mm (4.0 in)
2005	139.2 mm (5.5 in)
2006	81.8 mm (3.2 in)
2007	102.9 mm (4.1 in)
2008	93.5 mm (3.7 in)
2009	81.4 mm (3.2 in)
2010	87.9 mm (3.5 in)
2011	103.7 mm (4.1 in)
2012	40.6 mm (1.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at Guilford, 1978 to 2012. The record is 26 days in 2010, marked on the chart; the median year is 15 days.

Longest dry spell (CDD) at Guilford by year
Year	Longest dry spell (CDD)
1978	16 days
1979	18 days
1980	23 days
1981	12 days
1982	7 days
1983	13 days
1984	16 days
1985	20 days
1986	13 days
1987	20 days
1988	17 days
1989	12 days
1990	13 days
1991	15 days
1992	14 days
1993	10 days
1994	11 days
1995	15 days
1996	11 days
1997	14 days
1998	17 days
1999	24 days
2000	10 days
2001	20 days
2002	10 days
2003	16 days
2004	15 days
2005	13 days
2006	17 days
2007	14 days
2008	17 days
2009	15 days
2010	26 days
2011	13 days
2012	14 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Rainfall Return Levels

32 years, 1979 to 2011

A day with at least 61.2 mm (2.4 in) of rain is expected about once in 2 years. A day with at least 103.9 mm (4.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Guilford: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	61.2 mm (2.4 in)
5 years	76.8 mm (3.0 in)
10 years	85.1 mm (3.4 in)
25 years	93.9 mm (3.7 in)
50 years	99.3 mm (3.9 in)	Longer than the 32 years of record
100 years	103.9 mm (4.1 in)	Longer than the 32 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 32 years of values from 1979 to 2011.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 90.2 mm (3.6 in) in 1999; 86.1 mm (3.4 in) in 2007; 84.8 mm (3.3 in) in 1996.

Download the Data

Data for Guilford standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Guilford threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Year	Days with data	Share of year	Complete
2005	299	82%	No
2006	307	84%	No
2007	363	99%	Yes
2008	358	98%	Yes
2009	360	99%	Yes
2010	363	99%	Yes
2011	363	99%	Yes
2012	90	25%	No