Guanajal Weather Records (MXN00011023)

Record envelope, standing records and threshold days for Guanajal (MXN00011023), Mexico, with 53 years of record.

Key Facts for Guanajal

Guanajal (MXN00011023) is a weather station in Mexico at 21.02 latitude and -101.83 longitude, 1,767 m (5,797 ft) above sea level.
The station reports from 1961 to 2013, 53 years of record.
1,464 records set at Guanajal still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Guanajal tied a daily record high maximum temperature of 36.1 C (97.0 F) on 27 April 2013.

About the Station

Location: Mexico, 21.02 latitude, -101.83 longitude.
Elevation: 1,767 m (5,797 ft).
Period of record: 1961 to 2013, 53 years.
Eligible elements: tmax, tmin, prcp.

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 Guanajal. 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 Guanajal, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	31.7 C (89.1 F)	-7.8 C (18.0 F)	n/a	n/a
Feb	33.3 C (91.9 F)	-6.1 C (21.0 F)	n/a	n/a
Mar	36.1 C (97.0 F)	-5.0 C (23.0 F)	n/a	n/a
Apr	38.3 C (100.9 F)	1.1 C (34.0 F)	n/a	n/a
May	40.6 C (105.1 F)	4.4 C (39.9 F)	n/a	n/a
Jun	39.4 C (102.9 F)	6.1 C (43.0 F)	n/a	n/a
Jul	35.0 C (95.0 F)	7.8 C (46.0 F)	n/a	n/a
Aug	35.6 C (96.1 F)	6.7 C (44.1 F)	n/a	n/a
Sep	34.4 C (93.9 F)	0.0 C (32.0 F)	n/a	n/a
Oct	34.4 C (93.9 F)	-0.6 C (30.9 F)	n/a	n/a
Nov	31.7 C (89.1 F)	-5.6 C (21.9 F)	n/a	n/a
Dec	30.6 C (87.1 F)	-9.4 C (15.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Guanajal still stand. 2011 holds the most, with 76.

Standing records at Guanajal by the year they were set
Year set	Standing records
1961	1
1962	26
1963	53
1964	45
1965	27
1966	45
1967	36
1968	36
1969	38
1970	41
1971	37
1972	56
1973	47
1974	33
1975	28
1976	45
1977	25
1978	24
1979	52
1980	14
1981	13
1982	33
1983	26
1984	20
1985	14
1986	24
1987	16
1988	20
1989	21
1990	13
1991	27
1992	18
1994	12
1995	35
1996	22
1997	42
1998	31
1999	20
2000	46
2001	6
2002	16
2003	28
2004	14
2005	11
2006	25
2007	23
2008	33
2009	7
2010	29
2011	76
2012	27
2013	7

All-Time Record Progression

3 new records

3 all-time records were set at Guanajal between 14 December 1997 and 25 May 2011. Each dot is a new record.

When Guanajal set new all-time records
Date	Kind	Detail
1997-12-14	Record low minimum temperature	Record low minimum temperature -9.4 C (15.1 F)
1998-05-07	Record high maximum temperature	Record high maximum temperature 40.0 C (104.0 F)
2011-05-25	Record high maximum temperature	Record high maximum temperature 40.6 C (105.1 F)

Wettest Day of Each Month

Jul: 90.4 mm (3.6 in)

The wettest day on record for each calendar month at Guanajal. The most was 90.4 mm (3.6 in) on 5 July 1976.

Record daily precipitation for each month at Guanajal
Month	Record daily precipitation (mm)	Date
Jan	25.9 mm (1.0 in)	15 January 1992
Feb	45.2 mm (1.8 in)	4 February 2010
Mar	22.6 mm (0.9 in)	4 March 1968
Apr	19.8 mm (0.8 in)	13 April 1962
May	53.3 mm (2.1 in)	26 May 2000
Jun	54.9 mm (2.2 in)	21 June 1999
Jul	90.4 mm (3.6 in)	5 July 1976
Aug	60.5 mm (2.4 in)	27 August 1967
Sep	71.9 mm (2.8 in)	2 September 1971
Oct	40.1 mm (1.6 in)	3 October 1996
Nov	30.2 mm (1.2 in)	11 November 2008
Dec	25.9 mm (1.0 in)	15 December 1963

Period of Record Coverage

1961 to 2013

52 years of record at Guanajal, 1961 to 2013. 7 years have data for under 90 percent of days and are left out of rankings: 1961, 1962, 1967, 1990, 1992, 1994, 2013.

Days with data per year at Guanajal
Year	Days with data	Share of year	Complete
1961	31	8%	No
1962	306	84%	No
1963	365	100%	Yes
1964	365	100%	Yes
1965	365	100%	Yes
1966	365	100%	Yes
1967	304	83%	No
1968	364	99%	Yes
1969	365	100%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	365	100%	Yes
1973	365	100%	Yes
1974	365	100%	Yes
1975	365	100%	Yes
1976	365	100%	Yes
1977	365	100%	Yes
1978	364	100%	Yes
1979	365	100%	Yes
1980	365	100%	Yes
1981	365	100%	Yes
1982	365	100%	Yes
1983	365	100%	Yes
1984	365	100%	Yes
1985	365	100%	Yes
1986	334	92%	Yes
1987	334	92%	Yes
1988	364	99%	Yes
1989	365	100%	Yes
1990	212	58%	No
1991	365	100%	Yes
1992	91	25%	No
1994	245	67%	No
1995	364	100%	Yes
1996	366	100%	Yes
1997	364	100%	Yes
1998	334	92%	Yes
1999	334	92%	Yes
2000	366	100%	Yes
2001	356	98%	Yes
2002	340	93%	Yes
2003	351	96%	Yes
2004	366	100%	Yes
2005	365	100%	Yes
2006	365	100%	Yes
2007	365	100%	Yes
2008	366	100%	Yes
2009	365	100%	Yes
2010	365	100%	Yes
2011	365	100%	Yes
2012	336	92%	Yes
2013	61	17%	No

Latest Records

Latest records at Guanajal
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
27 April 2013	Guanajal, MX	daily high max (Tie)	36.1 C (97.0 F)	tie	0 years	1 of 100 (Routine)
25 April 2013	Guanajal, MX	daily high max (Tie)	36.7 C (98.1 F)	tie	39 years	4 of 100 (Routine)
23 April 2013	Guanajal, MX	daily high max (Tie)	36.7 C (98.1 F)	tie	40 years	4 of 100 (Routine)
19 April 2013	Guanajal, MX	daily high max	36.1 C (97.0 F)	0.5 C (0.9 F)	30 years	15 of 100 (Routine)
18 April 2013	Guanajal, MX	daily high max	37.8 C (100.0 F)	2.2 C (4.0 F)	22 years	18 of 100 (Routine)
17 April 2013	Guanajal, MX	daily high max	37.8 C (100.0 F)	1.7 C (3.1 F)	35 years	20 of 100 (Routine)
2 April 2013	Guanajal, MX	daily high max (Tie)	35.6 C (96.1 F)	tie	31 years	3 of 100 (Routine)
1 April 2013	Guanajal, MX	daily high max	36.7 C (98.1 F)	1.1 C (2.0 F)	31 years	17 of 100 (Routine)
31 March 2013	Guanajal, MX	monthly high max (Tie)	36.1 C (97.0 F)	tie	31 years	6 of 100 (Routine)
15 March 2013	Guanajal, MX	daily low max	17.8 C (64.0 F)	4.4 C (7.9 F)	48 years	34 of 100 (Routine)
13 March 2013	Guanajal, MX	daily low max (Tie)	22.8 C (73.0 F)	tie	44 years	4 of 100 (Routine)
5 March 2013	Guanajal, MX	daily low min (Tie)	-0.6 C (30.9 F)	tie	30 years	3 of 100 (Routine)
4 March 2013	Guanajal, MX	daily low min	-0.6 C (30.9 F)	1.2 C (2.2 F)	40 years	21 of 100 (Routine)
3 March 2013	Guanajal, MX	daily low min	-3.3 C (26.1 F)	2.2 C (4.0 F)	40 years	25 of 100 (Routine)
31 December 2012	Guanajal, MX	daily rain	10.9 mm (0.4 in)	7.3 mm (0.29 in)	17 years	20 of 100 (Routine)
18 December 2012	Guanajal, MX	daily high max	29.4 C (84.9 F)	0.5 C (0.9 F)	12 years	9 of 100 (Routine)
19 November 2012	Guanajal, MX	daily high max (Tie)	30.0 C (86.0 F)	tie	26 years	3 of 100 (Routine)
4 November 2012	Guanajal, MX	daily low max	17.8 C (64.0 F)	2.8 C (5.0 F)	10 years	19 of 100 (Routine)
29 October 2012	Guanajal, MX	daily rain	15.7 mm (0.6 in)	13.4 mm (0.5 in)	32 years	20 of 100 (Routine)
28 October 2012	Guanajal, MX	daily high max (Tie)	30.0 C (86.0 F)	tie	41 years	4 of 100 (Routine)

Climate Trend

40 complete years, 1963 to 2011

One stripe for each of 40 complete years at Guanajal, 1963 to 2011. Blue stripes are years cooler than the station's own mean of 18.0 C (64.4 F); red stripes are warmer. The coolest year was 1968, at 17.0 C (62.6 F), and the warmest was 2011, at 19.5 C (67.1 F). The strongest colour marks a difference of 1.5 C (2.7 F).

Annual mean temperature at Guanajal as warming stripes, 1963 to 2011
Year	Annual mean temperature	Difference from the station mean
1963	18.0 C	+0.01 C
1964	17.7 C	-0.28 C
1965	17.7 C	-0.36 C
1966	17.0 C	-1.02 C
1968	17.0 C	-1.03 C
1969	17.9 C	-0.13 C
1970	17.2 C	-0.86 C
1971	17.4 C	-0.63 C
1972	18.5 C	+0.44 C
1973	17.8 C	-0.24 C
1974	17.4 C	-0.58 C
1975	17.3 C	-0.68 C
1976	17.5 C	-0.49 C
1977	17.7 C	-0.32 C
1978	17.8 C	-0.20 C
1979	18.2 C	+0.13 C
1980	18.4 C	+0.41 C
1981	17.9 C	-0.10 C
1982	18.5 C	+0.43 C
1983	17.7 C	-0.31 C
1984	17.4 C	-0.64 C
1985	17.6 C	-0.47 C
1988	17.8 C	-0.23 C
1989	18.3 C	+0.31 C
1991	18.8 C	+0.76 C
1995	18.9 C	+0.91 C
1996	18.6 C	+0.55 C
1997	18.4 C	+0.33 C
2000	18.9 C	+0.85 C
2001	18.5 C	+0.48 C
2002	18.6 C	+0.58 C
2003	18.4 C	+0.33 C
2004	17.7 C	-0.28 C
2005	18.8 C	+0.82 C
2006	18.6 C	+0.60 C
2007	18.0 C	-0.04 C
2008	18.0 C	-0.06 C
2009	18.2 C	+0.16 C
2010	17.4 C	-0.61 C
2011	19.5 C	+1.46 C

The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1963 to 2011. In Fahrenheit: 0.4 F (0.2 to 0.6) per decade. The slope is a straight line fitted to 40 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Guanajal
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.2 C (0.1 to 0.3) per decade	0.4 F (0.2 to 0.6) per decade	1963 to 2011	40	Rise
Mean daily maximum	0.19 C (-0.02 to 0.41) per decade	0.35 F (-0.04 to 0.73) per decade	1963 to 2011	40	Not clearly different from zero
Mean daily minimum	0.2 C (0.1 to 0.4) per decade	0.4 F (0.2 to 0.7) per decade	1963 to 2011	40	Rise

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1961 to 2013

Yearly extremes at Guanajal: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	40.6 C (105.1 F)	2011	35.9 C (96.5 F)	52
Coldest night (TNn)	-9.4 C (15.1 F)	1997	-3.3 C (26.1 F)	52
Wettest day (Rx1day)	90.4 mm (3.6 in)	1976	45.2 mm (1.8 in)	52
Wettest five days (Rx5day)	244.8 mm (9.6 in)	1976	89.5 mm (3.5 in)	52
Longest dry spell (CDD)	144 days	2000	64 days	52

Hottest day (TXx)

The hottest day of the year at Guanajal, 1961 to 2013. The record is 40.6 C (105.1 F) in 2011, marked on the chart; the median year is 35.9 C (96.5 F).

Hottest day (TXx) at Guanajal by year
Year	Hottest day (TXx)
1961	25.0 C (77.0 F)
1962	35.6 C (96.1 F)
1963	35.0 C (95.0 F)
1964	34.4 C (93.9 F)
1965	37.2 C (99.0 F)
1966	35.0 C (95.0 F)
1967	34.4 C (93.9 F)
1968	34.4 C (93.9 F)
1969	35.0 C (95.0 F)
1970	35.0 C (95.0 F)
1971	35.0 C (95.0 F)
1972	37.2 C (99.0 F)
1973	37.8 C (100.0 F)
1974	37.2 C (99.0 F)
1975	35.6 C (96.1 F)
1976	39.4 C (102.9 F)
1977	36.1 C (97.0 F)
1978	37.2 C (99.0 F)
1979	35.6 C (96.1 F)
1980	36.1 C (97.0 F)
1981	35.6 C (96.1 F)
1982	38.3 C (100.9 F)
1983	39.4 C (102.9 F)
1984	34.4 C (93.9 F)
1985	35.6 C (96.1 F)
1986	36.7 C (98.1 F)
1987	34.4 C (93.9 F)
1988	36.1 C (97.0 F)
1989	36.1 C (97.0 F)
1990	34.4 C (93.9 F)
1991	36.7 C (98.1 F)
1992	30.6 C (87.1 F)
1994	35.6 C (96.1 F)
1995	37.8 C (100.0 F)
1996	35.6 C (96.1 F)
1997	35.6 C (96.1 F)
1998	40.0 C (104.0 F)
1999	37.2 C (99.0 F)
2000	37.2 C (99.0 F)
2001	36.7 C (98.1 F)
2002	36.1 C (97.0 F)
2003	36.7 C (98.1 F)
2004	35.0 C (95.0 F)
2005	38.9 C (102.0 F)
2006	37.8 C (100.0 F)
2007	35.0 C (95.0 F)
2008	35.0 C (95.0 F)
2009	35.0 C (95.0 F)
2010	35.6 C (96.1 F)
2011	40.6 C (105.1 F)
2012	40.0 C (104.0 F)
2013	37.8 C (100.0 F)

Coldest night (TNn)

The coldest night of the year at Guanajal, 1961 to 2013. The record is -9.4 C (15.1 F) in 1997, marked on the chart; the median year is -3.3 C (26.1 F).

Coldest night (TNn) at Guanajal by year
Year	Coldest night (TNn)
1961	-2.2 C (28.0 F)
1962	-4.4 C (24.1 F)
1963	-5.0 C (23.0 F)
1964	-6.1 C (21.0 F)
1965	-1.1 C (30.0 F)
1966	-7.8 C (18.0 F)
1967	-6.1 C (21.0 F)
1968	-5.0 C (23.0 F)
1969	-5.6 C (21.9 F)
1970	-5.0 C (23.0 F)
1971	-4.4 C (24.1 F)
1972	-5.0 C (23.0 F)
1973	-7.2 C (19.0 F)
1974	-3.3 C (26.1 F)
1975	-5.6 C (21.9 F)
1976	-6.1 C (21.0 F)
1977	-3.3 C (26.1 F)
1978	-5.0 C (23.0 F)
1979	-3.3 C (26.1 F)
1980	-2.2 C (28.0 F)
1981	-2.2 C (28.0 F)
1982	-5.0 C (23.0 F)
1983	-2.8 C (27.0 F)
1984	-2.2 C (28.0 F)
1985	-3.9 C (25.0 F)
1986	-3.9 C (25.0 F)
1987	-1.1 C (30.0 F)
1988	0.0 C (32.0 F)
1989	-3.3 C (26.1 F)
1990	0.0 C (32.0 F)
1991	-1.7 C (28.9 F)
1992	-1.7 C (28.9 F)
1994	0.6 C (33.1 F)
1995	0.0 C (32.0 F)
1996	-1.1 C (30.0 F)
1997	-9.4 C (15.1 F)
1998	-4.4 C (24.1 F)
1999	-2.2 C (28.0 F)
2000	-2.8 C (27.0 F)
2001	0.0 C (32.0 F)
2002	-1.1 C (30.0 F)
2003	-2.2 C (28.0 F)
2004	-1.1 C (30.0 F)
2005	0.0 C (32.0 F)
2006	-5.0 C (23.0 F)
2007	0.6 C (33.1 F)
2008	-3.3 C (26.1 F)
2009	0.0 C (32.0 F)
2010	-3.9 C (25.0 F)
2011	-2.8 C (27.0 F)
2012	-0.6 C (30.9 F)
2013	-3.3 C (26.1 F)

Wettest day (Rx1day)

The wettest day of the year at Guanajal, 1961 to 2013. The record is 90.4 mm (3.6 in) in 1976, marked on the chart; the median year is 45.2 mm (1.8 in).

Wettest day (Rx1day) at Guanajal by year
Year	Wettest day (Rx1day)
1961	33.8 mm (1.3 in)
1962	35.3 mm (1.4 in)
1963	32.8 mm (1.3 in)
1964	54.9 mm (2.2 in)
1965	41.9 mm (1.6 in)
1966	37.6 mm (1.5 in)
1967	60.5 mm (2.4 in)
1968	32.0 mm (1.3 in)
1969	48.3 mm (1.9 in)
1970	35.8 mm (1.4 in)
1971	71.9 mm (2.8 in)
1972	35.3 mm (1.4 in)
1973	45.2 mm (1.8 in)
1974	52.6 mm (2.1 in)
1975	46.7 mm (1.8 in)
1976	90.4 mm (3.6 in)
1977	45.7 mm (1.8 in)
1978	34.3 mm (1.4 in)
1979	40.9 mm (1.6 in)
1980	26.7 mm (1.1 in)
1981	61.0 mm (2.4 in)
1982	33.0 mm (1.3 in)
1983	40.4 mm (1.6 in)
1984	43.2 mm (1.7 in)
1985	40.4 mm (1.6 in)
1986	52.6 mm (2.1 in)
1987	25.4 mm (1.0 in)
1988	62.5 mm (2.5 in)
1989	41.9 mm (1.6 in)
1990	21.3 mm (0.8 in)
1991	39.4 mm (1.6 in)
1992	25.9 mm (1.0 in)
1994	50.8 mm (2.0 in)
1995	55.4 mm (2.2 in)
1996	40.1 mm (1.6 in)
1997	47.5 mm (1.9 in)
1998	30.0 mm (1.2 in)
1999	55.1 mm (2.2 in)
2000	53.3 mm (2.1 in)
2001	62.5 mm (2.5 in)
2002	45.5 mm (1.8 in)
2003	69.3 mm (2.7 in)
2004	47.8 mm (1.9 in)
2005	41.4 mm (1.6 in)
2006	78.5 mm (3.1 in)
2007	48.3 mm (1.9 in)
2008	48.3 mm (1.9 in)
2009	39.9 mm (1.6 in)
2010	45.2 mm (1.8 in)
2011	51.8 mm (2.0 in)
2012	59.9 mm (2.4 in)
2013	0.0 mm (0.00 in)

Wettest five days (Rx5day)

The wettest five days of the year at Guanajal, 1961 to 2013. The record is 244.8 mm (9.6 in) in 1976, marked on the chart; the median year is 89.5 mm (3.5 in).

Wettest five days (Rx5day) at Guanajal by year
Year	Wettest five days (Rx5day)
1961	69.9 mm (2.8 in)
1962	79.5 mm (3.1 in)
1963	80.5 mm (3.2 in)
1964	89.2 mm (3.5 in)
1965	98.6 mm (3.9 in)
1966	58.2 mm (2.3 in)
1967	100.4 mm (4.0 in)
1968	75.6 mm (3.0 in)
1969	89.2 mm (3.5 in)
1970	81.3 mm (3.2 in)
1971	128.6 mm (5.1 in)
1972	61.3 mm (2.4 in)
1973	119.8 mm (4.7 in)
1974	111.3 mm (4.4 in)
1975	113.5 mm (4.5 in)
1976	244.8 mm (9.6 in)
1977	112.9 mm (4.4 in)
1978	107.7 mm (4.2 in)
1979	95.5 mm (3.8 in)
1980	70.1 mm (2.8 in)
1981	119.1 mm (4.7 in)
1982	75.9 mm (3.0 in)
1983	91.9 mm (3.6 in)
1984	93.0 mm (3.7 in)
1985	80.0 mm (3.1 in)
1986	89.3 mm (3.5 in)
1987	62.8 mm (2.5 in)
1988	123.2 mm (4.9 in)
1989	70.3 mm (2.8 in)
1990	48.0 mm (1.9 in)
1991	109.3 mm (4.3 in)
1992	50.6 mm (2.0 in)
1994	114.6 mm (4.5 in)
1995	81.4 mm (3.2 in)
1996	77.2 mm (3.0 in)
1997	99.9 mm (3.9 in)
1998	73.5 mm (2.9 in)
1999	87.9 mm (3.5 in)
2000	73.1 mm (2.9 in)
2001	113.6 mm (4.5 in)
2002	84.3 mm (3.3 in)
2003	163.3 mm (6.4 in)
2004	106.2 mm (4.2 in)
2005	57.3 mm (2.3 in)
2006	130.1 mm (5.1 in)
2007	156.8 mm (6.2 in)
2008	89.7 mm (3.5 in)
2009	102.3 mm (4.0 in)
2010	106.0 mm (4.2 in)
2011	99.6 mm (3.9 in)
2012	70.1 mm (2.8 in)
2013	0.0 mm (0.00 in)

Longest dry spell (CDD)

The longest dry spell of the year at Guanajal, 1961 to 2013. The record is 144 days in 2000, marked on the chart; the median year is 64 days.

Longest dry spell (CDD) at Guanajal by year
Year	Longest dry spell (CDD)
1961	112 days
1962	69 days
1963	87 days
1964	31 days
1965	56 days
1966	55 days
1967	61 days
1968	39 days
1969	141 days
1970	86 days
1971	131 days
1972	59 days
1973	62 days
1974	40 days
1975	61 days
1976	59 days
1977	80 days
1978	44 days
1979	55 days
1980	51 days
1981	35 days
1982	54 days
1983	123 days
1984	61 days
1985	83 days
1986	104 days
1987	53 days
1988	66 days
1989	76 days
1990	67 days
1991	88 days
1992	19 days
1994	59 days
1995	100 days
1996	113 days
1997	50 days
1998	128 days
1999	74 days
2000	144 days
2001	89 days
2002	61 days
2003	103 days
2004	40 days
2005	70 days
2006	105 days
2007	57 days
2008	61 days
2009	62 days
2010	100 days
2011	103 days
2012	100 days
2013	61 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.

Frost Dates and Growing Season

32 years with a frost

Across 32 years with a frost, the median last spring frost at Guanajal falls on 15 February and the median first autumn frost on 20 November, which leaves a median of 277 days between them.

Fitted over all years, the growing season changes by +10.8 days per decade at this station.

Frost dates and growing season at Guanajal
Measure	Median, all years	Earliest period	Recent period (1965 to 2011)	Recent against earliest	Fitted trend
Last spring frost	15 February	n/a	15 February	n/a	-6.3 days per decade
First autumn frost	20 November	n/a	20 November	n/a	+4.4 days per decade
Growing days	277 days	n/a	277 days	n/a	+10.8 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

47 years, 1961 to 2012

A day with at least 44.4 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 90.6 mm (3.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Guanajal: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	44.4 mm (1.7 in)
5 years	56.3 mm (2.2 in)
10 years	64.4 mm (2.5 in)
25 years	74.8 mm (2.9 in)
50 years	82.6 mm (3.3 in)	Longer than the 47 years of record
100 years	90.6 mm (3.6 in)	Longer than the 47 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, 47 years of values from 1961 to 2012.

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: 90.4 mm (3.6 in) in 1976; 78.5 mm (3.1 in) in 2006; 71.9 mm (2.8 in) in 1971.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Download the Data

Data for Guanajal standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Guanajal 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).