Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at El Sitio. 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 El Sitio, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
30.0 C (86.0 F)
-13.3 C (8.1 F)
n/a
n/a
Feb
32.2 C (90.0 F)
-14.4 C (6.1 F)
n/a
n/a
Mar
33.9 C (93.0 F)
-5.0 C (23.0 F)
n/a
n/a
Apr
40.0 C (104.0 F)
-2.2 C (28.0 F)
n/a
n/a
May
40.6 C (105.1 F)
5.0 C (41.0 F)
n/a
n/a
Jun
45.0 C (113.0 F)
6.7 C (44.1 F)
n/a
n/a
Jul
42.8 C (109.0 F)
5.0 C (41.0 F)
n/a
n/a
Aug
38.9 C (102.0 F)
6.7 C (44.1 F)
n/a
n/a
Sep
40.6 C (105.1 F)
1.7 C (35.1 F)
n/a
n/a
Oct
37.2 C (99.0 F)
-3.3 C (26.1 F)
n/a
n/a
Nov
33.3 C (91.9 F)
-7.2 C (19.0 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
Year with most
1,464 records at El Sitio still stand. 1959 holds the most, with 335.
Standing records at El Sitio by the year they were set
Year set
Standing records
1955
30
1956
50
1957
72
1958
66
1959
335
1960
43
1961
32
1962
24
1963
28
1964
53
1965
53
1966
56
1967
42
1968
87
1969
28
1970
34
1971
27
1972
36
1973
40
1974
27
1975
26
1976
54
1977
53
1978
45
1979
25
1980
17
1981
7
1982
17
1983
10
1984
9
1985
14
1986
16
1987
8
Wettest Day of Each Month
Aug: 61.0 mm (2.4 in)
The wettest day on record for each calendar month at El Sitio. The most was 61.0 mm (2.4 in) on 23 August 1965.
Record daily precipitation for each month at El Sitio
Month
Record daily precipitation (mm)
Date
Jan
19.8 mm (0.8 in)
24 January 1979
Feb
32.8 mm (1.3 in)
3 February 1965
Mar
39.9 mm (1.6 in)
3 March 1983
Apr
18.8 mm (0.7 in)
22 April 1987
May
45.0 mm (1.8 in)
2 May 1966
Jun
59.9 mm (2.4 in)
25 June 1966
Jul
59.9 mm (2.4 in)
1 July 1971
Aug
61.0 mm (2.4 in)
23 August 1965
Sep
42.9 mm (1.7 in)
27 September 1955
Oct
36.8 mm (1.4 in)
2 October 1977
Nov
40.9 mm (1.6 in)
20 November 1960
Dec
53.3 mm (2.1 in)
8 December 1959
Period of Record Coverage
1955 to 1987
Complete yearUnder 90 percent of days
33 years of record at El Sitio, 1955 to 1987. 3 years have data for under 90 percent of days and are left out of rankings: 1955, 1983, 1987.
Cooler than the station meanWarmer than the station mean
One stripe for each of 26 complete years at El Sitio, 1956 to 1986. Blue stripes are years cooler than the station's own mean of 18.2 C (64.8 F); red stripes are warmer. The coolest year was 1966, at 16.3 C (61.3 F), and the warmest was 1959, at 23.5 C (74.4 F). The strongest colour marks a difference of 5.4 C (9.7 F).
Annual mean temperature at El Sitio as warming stripes, 1956 to 1986
Year
Annual mean temperature
Difference from the station mean
1956
19.0 C
+0.79 C
1957
19.3 C
+1.13 C
1958
18.7 C
+0.53 C
1959
23.5 C
+5.33 C
1961
17.8 C
-0.45 C
1962
18.4 C
+0.22 C
1963
18.1 C
-0.12 C
1964
17.2 C
-1.01 C
1965
16.9 C
-1.26 C
1966
16.3 C
-1.90 C
1967
18.0 C
-0.20 C
1968
16.8 C
-1.36 C
1969
18.8 C
+0.55 C
1970
18.2 C
+0.04 C
1971
18.4 C
+0.23 C
1972
18.9 C
+0.66 C
1973
17.6 C
-0.60 C
1974
17.7 C
-0.47 C
1975
17.5 C
-0.69 C
1976
16.8 C
-1.39 C
1977
17.7 C
-0.49 C
1978
18.5 C
+0.32 C
1980
18.6 C
+0.41 C
1981
18.0 C
-0.17 C
1984
18.2 C
-0.04 C
1986
18.2 C
-0.05 C
This station does not have enough complete years (30 are needed) to fit a temperature trend.
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
1955 to 1987
Yearly extremes at El Sitio: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
45.0 C (113.0 F)
1959
38.9 C (102.0 F)
33
Coldest night (TNn)
-14.4 C (6.1 F)
1956
-6.1 C (21.0 F)
33
Wettest day (Rx1day)
61.0 mm (2.4 in)
1965
39.9 mm (1.6 in)
33
Wettest five days (Rx5day)
149.4 mm (5.9 in)
1966
79.7 mm (3.1 in)
33
Longest dry spell (CDD)
178 days
1962
72 days
33
Hottest day (TXx)
The hottest day of the year at El Sitio, 1955 to 1987. The record is 45.0 C (113.0 F) in 1959, marked on the chart; the median year is 38.9 C (102.0 F).
Hottest day (TXx) at El Sitio by year
Year
Hottest day (TXx)
1955
36.7 C (98.1 F)
1956
38.9 C (102.0 F)
1957
38.9 C (102.0 F)
1958
40.0 C (104.0 F)
1959
45.0 C (113.0 F)
1960
40.0 C (104.0 F)
1961
38.9 C (102.0 F)
1962
38.9 C (102.0 F)
1963
38.9 C (102.0 F)
1964
42.8 C (109.0 F)
1965
40.0 C (104.0 F)
1966
38.9 C (102.0 F)
1967
38.9 C (102.0 F)
1968
37.8 C (100.0 F)
1969
41.7 C (107.1 F)
1970
38.9 C (102.0 F)
1971
38.9 C (102.0 F)
1972
38.9 C (102.0 F)
1973
40.6 C (105.1 F)
1974
40.6 C (105.1 F)
1975
40.6 C (105.1 F)
1976
38.9 C (102.0 F)
1977
37.8 C (100.0 F)
1978
40.6 C (105.1 F)
1979
38.9 C (102.0 F)
1980
40.6 C (105.1 F)
1981
38.9 C (102.0 F)
1982
40.0 C (104.0 F)
1983
37.8 C (100.0 F)
1984
37.8 C (100.0 F)
1985
38.9 C (102.0 F)
1986
37.8 C (100.0 F)
1987
35.0 C (95.0 F)
Coldest night (TNn)
The coldest night of the year at El Sitio, 1955 to 1987. The record is -14.4 C (6.1 F) in 1956, marked on the chart; the median year is -6.1 C (21.0 F).
Coldest night (TNn) at El Sitio by year
Year
Coldest night (TNn)
1955
-3.3 C (26.1 F)
1956
-14.4 C (6.1 F)
1957
-7.2 C (19.0 F)
1958
-7.2 C (19.0 F)
1959
0.0 C (32.0 F)
1960
-6.1 C (21.0 F)
1961
-6.1 C (21.0 F)
1962
-13.3 C (8.1 F)
1963
-7.2 C (19.0 F)
1964
-10.0 C (14.0 F)
1965
-8.3 C (17.1 F)
1966
-8.3 C (17.1 F)
1967
-9.4 C (15.1 F)
1968
-6.1 C (21.0 F)
1969
-6.1 C (21.0 F)
1970
-6.1 C (21.0 F)
1971
-8.3 C (17.1 F)
1972
-6.1 C (21.0 F)
1973
-7.2 C (19.0 F)
1974
-6.1 C (21.0 F)
1975
-6.1 C (21.0 F)
1976
-6.1 C (21.0 F)
1977
-5.0 C (23.0 F)
1978
-7.2 C (19.0 F)
1979
-7.2 C (19.0 F)
1980
-4.4 C (24.1 F)
1981
-3.3 C (26.1 F)
1982
-4.4 C (24.1 F)
1983
-5.0 C (23.0 F)
1984
-6.1 C (21.0 F)
1985
-6.1 C (21.0 F)
1986
-6.1 C (21.0 F)
1987
-8.3 C (17.1 F)
Wettest day (Rx1day)
The wettest day of the year at El Sitio, 1955 to 1987. The record is 61.0 mm (2.4 in) in 1965, marked on the chart; the median year is 39.9 mm (1.6 in).
Wettest day (Rx1day) at El Sitio by year
Year
Wettest day (Rx1day)
1955
42.9 mm (1.7 in)
1956
22.9 mm (0.9 in)
1957
36.8 mm (1.4 in)
1958
35.8 mm (1.4 in)
1959
53.3 mm (2.1 in)
1960
40.9 mm (1.6 in)
1961
45.0 mm (1.8 in)
1962
32.8 mm (1.3 in)
1963
41.9 mm (1.6 in)
1964
33.8 mm (1.3 in)
1965
61.0 mm (2.4 in)
1966
59.9 mm (2.4 in)
1967
29.0 mm (1.1 in)
1968
57.9 mm (2.3 in)
1969
54.9 mm (2.2 in)
1970
39.9 mm (1.6 in)
1971
59.9 mm (2.4 in)
1972
39.9 mm (1.6 in)
1973
48.8 mm (1.9 in)
1974
35.8 mm (1.4 in)
1975
42.9 mm (1.7 in)
1976
35.8 mm (1.4 in)
1977
36.8 mm (1.4 in)
1978
39.9 mm (1.6 in)
1979
35.8 mm (1.4 in)
1980
40.9 mm (1.6 in)
1981
39.9 mm (1.6 in)
1982
19.8 mm (0.8 in)
1983
39.9 mm (1.6 in)
1984
30.0 mm (1.2 in)
1985
32.8 mm (1.3 in)
1986
45.0 mm (1.8 in)
1987
18.8 mm (0.7 in)
Wettest five days (Rx5day)
The wettest five days of the year at El Sitio, 1955 to 1987. The record is 149.4 mm (5.9 in) in 1966, marked on the chart; the median year is 79.7 mm (3.1 in).
Wettest five days (Rx5day) at El Sitio by year
Year
Wettest five days (Rx5day)
1955
62.9 mm (2.5 in)
1956
46.5 mm (1.8 in)
1957
68.1 mm (2.7 in)
1958
101.3 mm (4.0 in)
1959
65.1 mm (2.6 in)
1960
84.1 mm (3.3 in)
1961
79.7 mm (3.1 in)
1962
65.1 mm (2.6 in)
1963
88.4 mm (3.5 in)
1964
82.5 mm (3.2 in)
1965
116.1 mm (4.6 in)
1966
149.4 mm (5.9 in)
1967
64.4 mm (2.5 in)
1968
98.6 mm (3.9 in)
1969
114.6 mm (4.5 in)
1970
79.5 mm (3.1 in)
1971
83.5 mm (3.3 in)
1972
61.4 mm (2.4 in)
1973
78.2 mm (3.1 in)
1974
67.3 mm (2.6 in)
1975
90.4 mm (3.6 in)
1976
97.2 mm (3.8 in)
1977
70.4 mm (2.8 in)
1978
124.5 mm (4.9 in)
1979
60.0 mm (2.4 in)
1980
89.2 mm (3.5 in)
1981
97.4 mm (3.8 in)
1982
21.9 mm (0.9 in)
1983
68.6 mm (2.7 in)
1984
81.6 mm (3.2 in)
1985
59.7 mm (2.4 in)
1986
118.0 mm (4.6 in)
1987
39.3 mm (1.5 in)
Longest dry spell (CDD)
The longest dry spell of the year at El Sitio, 1955 to 1987. The record is 178 days in 1962, marked on the chart; the median year is 72 days.
Longest dry spell (CDD) at El Sitio by year
Year
Longest dry spell (CDD)
1955
85 days
1956
121 days
1957
48 days
1958
40 days
1959
30 days
1960
117 days
1961
57 days
1962
178 days
1963
52 days
1964
72 days
1965
86 days
1966
54 days
1967
61 days
1968
63 days
1969
142 days
1970
92 days
1971
168 days
1972
63 days
1973
93 days
1974
116 days
1975
126 days
1976
138 days
1977
152 days
1978
68 days
1979
60 days
1980
159 days
1981
72 days
1982
78 days
1983
58 days
1984
105 days
1985
36 days
1986
54 days
1987
45 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
25 years with a frost
Across 25 years with a frost, the median last spring frost at El Sitio falls on 16 March and the median first autumn frost on 17 November, which leaves a median of 242 days between them.
Fitted over all years, the growing season changes by -2.3 days per decade at this station.
Frost dates and growing season at El Sitio
Measure
Median, all years
Earliest period
Recent period (1956 to 1986)
Recent against earliest
Fitted trend
Last spring frost
16 March
n/a
16 March
n/a
+3.6 days per decade
First autumn frost
17 November
n/a
17 November
n/a
+1.2 days per decade
Growing days
242 days
n/a
242 days
n/a
-2.3 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
30 years, 1956 to 1986
A day with at least 39.9 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 70.3 mm (2.8 in) of rain is expected about once in 100 years.
Rainfall return levels at El Sitio: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
39.9 mm (1.6 in)
5 years
49.5 mm (1.9 in)
10 years
55.2 mm (2.2 in)
25 years
61.8 mm (2.4 in)
50 years
66.2 mm (2.6 in)
Longer than the 30 years of record
100 years
70.3 mm (2.8 in)
Longer than the 30 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, 30 years of values from 1956 to 1986.
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: 61.0 mm (2.4 in) in 1965; 59.9 mm (2.4 in) in 1966; 59.9 mm (2.4 in) in 1971.
Download the Data
Data for El Sitio standing records by year: CSV or JSON. Field meanings are on the data page.
Data for El Sitio 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.