Record envelope, standing records and threshold days for Rainbow Lake (USC00387113), South Carolina, United States, with 51 years of record.
Key Facts for Rainbow Lake
Rainbow Lake (USC00387113) is a weather station in South Carolina, United States at 35.12 latitude and -81.97 longitude, 229 m (751 ft) above sea level.
The station reports from 1928 to 1978, 51 years of record.
1,464 records set at Rainbow Lake still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Rainbow Lake set a daily record low minimum temperature of -2.2 C (28.0 F) on 18 October 1978.
About the Station
Location: South Carolina, United States, 35.12 latitude, -81.97 longitude.
Elevation: 229 m (751 ft).
Period of record: 1928 to 1978, 51 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record
Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Rainbow Lake. 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 Rainbow Lake, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
26.7 C (80.1 F)
-20.6 C (-5.1 F)
n/a
n/a
Feb
26.1 C (79.0 F)
-16.1 C (3.0 F)
n/a
n/a
Mar
33.3 C (91.9 F)
-15.6 C (3.9 F)
n/a
n/a
Apr
33.3 C (91.9 F)
-5.0 C (23.0 F)
n/a
n/a
May
36.7 C (98.1 F)
-1.1 C (30.0 F)
n/a
n/a
Jun
40.6 C (105.1 F)
3.9 C (39.0 F)
n/a
n/a
Jul
41.1 C (106.0 F)
9.4 C (48.9 F)
n/a
n/a
Aug
39.4 C (102.9 F)
8.9 C (48.0 F)
n/a
n/a
Sep
38.9 C (102.0 F)
1.1 C (34.0 F)
n/a
n/a
Oct
36.7 C (98.1 F)
-6.1 C (21.0 F)
n/a
n/a
Nov
30.6 C (87.1 F)
-12.2 C (10.0 F)
n/a
n/a
Dec
26.7 C (80.1 F)
-18.3 C (-0.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Rainbow Lake still stand. 1943 holds the most, with 56.
Standing records at Rainbow Lake by the year they were set
Year set
Standing records
1928
10
1929
17
1930
32
1931
40
1932
25
1933
42
1934
30
1935
34
1936
28
1937
30
1938
31
1939
32
1940
42
1941
30
1942
27
1943
56
1944
27
1945
42
1946
29
1947
33
1948
25
1949
27
1950
33
1951
30
1952
33
1953
25
1954
43
1955
22
1956
32
1957
23
1958
21
1959
13
1960
38
1961
27
1962
33
1963
35
1964
19
1965
21
1966
23
1967
39
1968
30
1969
24
1970
25
1971
25
1972
16
1973
12
1974
26
1975
18
1976
41
1977
31
1978
17
Wettest Day of Each Month
Aug: 162.6 mm (6.4 in)
The wettest day on record for each calendar month at Rainbow Lake. The most was 162.6 mm (6.4 in) on 11 August 1928.
Record daily precipitation for each month at Rainbow Lake
Month
Record daily precipitation (mm)
Date
Jan
110.0 mm (4.3 in)
31 January 1939
Feb
84.6 mm (3.3 in)
2 February 1973
Mar
94.0 mm (3.7 in)
30 March 1977
Apr
85.6 mm (3.4 in)
6 April 1936
May
86.9 mm (3.4 in)
30 May 1938
Jun
100.6 mm (4.0 in)
1 June 1964
Jul
155.2 mm (6.1 in)
7 July 1967
Aug
162.6 mm (6.4 in)
11 August 1928
Sep
138.2 mm (5.4 in)
26 September 1956
Oct
152.4 mm (6.0 in)
7 October 1949
Nov
85.1 mm (3.4 in)
9 November 1962
Dec
108.0 mm (4.3 in)
7 December 1950
Period of Record Coverage
1928 to 1978
Complete yearUnder 90 percent of days
51 years of record at Rainbow Lake, 1928 to 1978. 4 years have data for under 90 percent of days and are left out of rankings: 1928, 1929, 1930, 1934.
Cooler than the station meanWarmer than the station mean
One stripe for each of 45 complete years at Rainbow Lake, 1932 to 1978. Blue stripes are years cooler than the station's own mean of 15.5 C (59.9 F); red stripes are warmer. The coolest year was 1976, at 14.4 C (58.0 F), and the warmest was 1939, at 16.5 C (61.7 F). The strongest colour marks a difference of 1.1 C (2.0 F).
Annual mean temperature at Rainbow Lake as warming stripes, 1932 to 1978
Year
Annual mean temperature
Difference from the station mean
1932
15.8 C
+0.24 C
1933
16.2 C
+0.69 C
1935
15.4 C
-0.13 C
1936
15.2 C
-0.28 C
1937
15.4 C
-0.09 C
1938
16.3 C
+0.83 C
1939
16.5 C
+0.97 C
1940
14.8 C
-0.71 C
1941
15.9 C
+0.34 C
1942
15.6 C
+0.07 C
1943
16.0 C
+0.50 C
1944
16.0 C
+0.44 C
1945
16.4 C
+0.85 C
1946
16.0 C
+0.46 C
1947
15.1 C
-0.41 C
1948
15.6 C
+0.07 C
1949
15.6 C
+0.11 C
1950
15.5 C
-0.02 C
1951
15.5 C
+0.02 C
1952
15.9 C
+0.37 C
1953
16.1 C
+0.62 C
1954
15.9 C
+0.43 C
1955
15.6 C
+0.13 C
1956
16.1 C
+0.55 C
1957
16.0 C
+0.53 C
1958
14.7 C
-0.80 C
1959
15.8 C
+0.26 C
1960
14.8 C
-0.73 C
1961
15.3 C
-0.21 C
1962
15.7 C
+0.21 C
1963
15.0 C
-0.53 C
1964
15.5 C
-0.04 C
1965
15.7 C
+0.17 C
1966
14.8 C
-0.67 C
1967
15.0 C
-0.52 C
1968
14.7 C
-0.80 C
1969
14.5 C
-1.04 C
1970
15.6 C
+0.04 C
1972
15.5 C
+0.00 C
1973
15.7 C
+0.22 C
1974
15.7 C
+0.21 C
1975
15.5 C
-0.03 C
1976
14.4 C
-1.09 C
1977
15.1 C
-0.43 C
1978
14.6 C
-0.94 C
The annual mean temperature here has fallen by 0.2 C (0.1 to 0.3) per decade over 1932 to 1978. In Fahrenheit: 0.3 F (0.2 to 0.5) per decade. The slope is a straight line fitted to 45 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Rainbow Lake
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.2 C (-0.3 to -0.1) per decade
-0.3 F (-0.5 to -0.2) per decade
1932 to 1978
45
Fall
Mean daily maximum
0.01 C (-0.11 to 0.13) per decade
0.02 F (-0.20 to 0.23) per decade
1932 to 1978
45
Not clearly different from zero
Mean daily minimum
-0.4 C (-0.5 to -0.3) per decade
-0.7 F (-0.9 to -0.5) per decade
1932 to 1978
45
Fall
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
1928 to 1978
Yearly extremes at Rainbow Lake: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
41.1 C (106.0 F)
1952
37.2 C (99.0 F)
51
Coldest night (TNn)
-20.6 C (-5.1 F)
1940
-12.2 C (10.0 F)
51
Wettest day (Rx1day)
162.6 mm (6.4 in)
1928
81.3 mm (3.2 in)
51
Wettest five days (Rx5day)
329.0 mm (13.0 in)
1928
128.0 mm (5.0 in)
51
Longest dry spell (CDD)
39 days
1935
21 days
51
Hottest day (TXx)
The hottest day of the year at Rainbow Lake, 1928 to 1978. The record is 41.1 C (106.0 F) in 1952, marked on the chart; the median year is 37.2 C (99.0 F).
Hottest day (TXx) at Rainbow Lake by year
Year
Hottest day (TXx)
1928
35.0 C (95.0 F)
1929
35.0 C (95.0 F)
1930
37.2 C (99.0 F)
1931
38.9 C (102.0 F)
1932
37.8 C (100.0 F)
1933
37.8 C (100.0 F)
1934
36.7 C (98.1 F)
1935
36.1 C (97.0 F)
1936
37.8 C (100.0 F)
1937
36.7 C (98.1 F)
1938
36.1 C (97.0 F)
1939
38.3 C (100.9 F)
1940
37.8 C (100.0 F)
1941
36.7 C (98.1 F)
1942
36.7 C (98.1 F)
1943
37.2 C (99.0 F)
1944
38.3 C (100.9 F)
1945
38.9 C (102.0 F)
1946
35.0 C (95.0 F)
1947
36.7 C (98.1 F)
1948
38.3 C (100.9 F)
1949
36.7 C (98.1 F)
1950
37.2 C (99.0 F)
1951
38.3 C (100.9 F)
1952
41.1 C (106.0 F)
1953
37.2 C (99.0 F)
1954
40.6 C (105.1 F)
1955
36.1 C (97.0 F)
1956
39.4 C (102.9 F)
1957
37.8 C (100.0 F)
1958
37.8 C (100.0 F)
1959
37.8 C (100.0 F)
1960
35.6 C (96.1 F)
1961
35.0 C (95.0 F)
1962
37.2 C (99.0 F)
1963
37.2 C (99.0 F)
1964
37.2 C (99.0 F)
1965
36.1 C (97.0 F)
1966
37.8 C (100.0 F)
1967
35.0 C (95.0 F)
1968
38.3 C (100.9 F)
1969
35.6 C (96.1 F)
1970
37.8 C (100.0 F)
1971
35.6 C (96.1 F)
1972
36.7 C (98.1 F)
1973
35.0 C (95.0 F)
1974
35.6 C (96.1 F)
1975
37.2 C (99.0 F)
1976
36.1 C (97.0 F)
1977
38.3 C (100.9 F)
1978
37.8 C (100.0 F)
Coldest night (TNn)
The coldest night of the year at Rainbow Lake, 1928 to 1978. The record is -20.6 C (-5.1 F) in 1940, marked on the chart; the median year is -12.2 C (10.0 F).
Coldest night (TNn) at Rainbow Lake by year
Year
Coldest night (TNn)
1928
-10.0 C (14.0 F)
1929
-11.7 C (10.9 F)
1930
-12.2 C (10.0 F)
1931
-6.1 C (21.0 F)
1932
-9.4 C (15.1 F)
1933
-12.2 C (10.0 F)
1934
-16.7 C (1.9 F)
1935
-16.7 C (1.9 F)
1936
-13.3 C (8.1 F)
1937
-11.7 C (10.9 F)
1938
-10.6 C (12.9 F)
1939
-8.9 C (16.0 F)
1940
-20.6 C (-5.1 F)
1941
-8.9 C (16.0 F)
1942
-17.2 C (1.0 F)
1943
-11.7 C (10.9 F)
1944
-10.6 C (12.9 F)
1945
-8.3 C (17.1 F)
1946
-10.6 C (12.9 F)
1947
-11.1 C (12.0 F)
1948
-13.9 C (7.0 F)
1949
-7.8 C (18.0 F)
1950
-12.2 C (10.0 F)
1951
-12.2 C (10.0 F)
1952
-10.0 C (14.0 F)
1953
-12.8 C (9.0 F)
1954
-10.6 C (12.9 F)
1955
-13.3 C (8.1 F)
1956
-10.0 C (14.0 F)
1957
-12.2 C (10.0 F)
1958
-16.1 C (3.0 F)
1959
-13.3 C (8.1 F)
1960
-15.6 C (3.9 F)
1961
-13.3 C (8.1 F)
1962
-18.3 C (-0.9 F)
1963
-13.9 C (7.0 F)
1964
-14.4 C (6.1 F)
1965
-10.6 C (12.9 F)
1966
-16.1 C (3.0 F)
1967
-15.6 C (3.9 F)
1968
-12.2 C (10.0 F)
1969
-13.9 C (7.0 F)
1970
-19.4 C (-2.9 F)
1971
-13.3 C (8.1 F)
1972
-14.4 C (6.1 F)
1973
-12.2 C (10.0 F)
1974
-11.7 C (10.9 F)
1975
-12.8 C (9.0 F)
1976
-13.9 C (7.0 F)
1977
-17.8 C (0.0 F)
1978
-16.1 C (3.0 F)
Wettest day (Rx1day)
The wettest day of the year at Rainbow Lake, 1928 to 1978. The record is 162.6 mm (6.4 in) in 1928, marked on the chart; the median year is 81.3 mm (3.2 in).
Wettest day (Rx1day) at Rainbow Lake by year
Year
Wettest day (Rx1day)
1928
162.6 mm (6.4 in)
1929
79.5 mm (3.1 in)
1930
47.0 mm (1.9 in)
1931
75.7 mm (3.0 in)
1932
122.9 mm (4.8 in)
1933
46.5 mm (1.8 in)
1934
75.4 mm (3.0 in)
1935
52.6 mm (2.1 in)
1936
85.6 mm (3.4 in)
1937
84.8 mm (3.3 in)
1938
86.9 mm (3.4 in)
1939
110.0 mm (4.3 in)
1940
110.2 mm (4.3 in)
1941
64.3 mm (2.5 in)
1942
70.6 mm (2.8 in)
1943
73.2 mm (2.9 in)
1944
84.1 mm (3.3 in)
1945
92.7 mm (3.6 in)
1946
73.2 mm (2.9 in)
1947
71.1 mm (2.8 in)
1948
80.3 mm (3.2 in)
1949
152.4 mm (6.0 in)
1950
108.0 mm (4.3 in)
1951
61.0 mm (2.4 in)
1952
69.1 mm (2.7 in)
1953
46.5 mm (1.8 in)
1954
63.2 mm (2.5 in)
1955
81.3 mm (3.2 in)
1956
138.2 mm (5.4 in)
1957
85.1 mm (3.4 in)
1958
102.9 mm (4.1 in)
1959
96.8 mm (3.8 in)
1960
74.9 mm (2.9 in)
1961
70.4 mm (2.8 in)
1962
85.1 mm (3.4 in)
1963
78.7 mm (3.1 in)
1964
152.9 mm (6.0 in)
1965
59.2 mm (2.3 in)
1966
75.2 mm (3.0 in)
1967
155.2 mm (6.1 in)
1968
81.3 mm (3.2 in)
1969
63.2 mm (2.5 in)
1970
65.3 mm (2.6 in)
1971
128.3 mm (5.1 in)
1972
111.5 mm (4.4 in)
1973
108.5 mm (4.3 in)
1974
71.4 mm (2.8 in)
1975
124.5 mm (4.9 in)
1976
108.5 mm (4.3 in)
1977
94.0 mm (3.7 in)
1978
79.2 mm (3.1 in)
Wettest five days (Rx5day)
The wettest five days of the year at Rainbow Lake, 1928 to 1978. The record is 329.0 mm (13.0 in) in 1928, marked on the chart; the median year is 128.0 mm (5.0 in).
Wettest five days (Rx5day) at Rainbow Lake by year
Year
Wettest five days (Rx5day)
1928
329.0 mm (13.0 in)
1929
152.4 mm (6.0 in)
1930
59.4 mm (2.3 in)
1931
103.6 mm (4.1 in)
1932
129.4 mm (5.1 in)
1933
96.5 mm (3.8 in)
1934
122.9 mm (4.8 in)
1935
96.8 mm (3.8 in)
1936
173.5 mm (6.8 in)
1937
158.2 mm (6.2 in)
1938
140.5 mm (5.5 in)
1939
175.7 mm (6.9 in)
1940
196.2 mm (7.7 in)
1941
71.2 mm (2.8 in)
1942
113.1 mm (4.5 in)
1943
113.1 mm (4.5 in)
1944
107.2 mm (4.2 in)
1945
236.8 mm (9.3 in)
1946
122.9 mm (4.8 in)
1947
106.7 mm (4.2 in)
1948
163.8 mm (6.4 in)
1949
167.6 mm (6.6 in)
1950
127.6 mm (5.0 in)
1951
133.2 mm (5.2 in)
1952
106.6 mm (4.2 in)
1953
104.4 mm (4.1 in)
1954
99.1 mm (3.9 in)
1955
104.2 mm (4.1 in)
1956
177.5 mm (7.0 in)
1957
132.4 mm (5.2 in)
1958
114.8 mm (4.5 in)
1959
132.1 mm (5.2 in)
1960
110.4 mm (4.3 in)
1961
140.7 mm (5.5 in)
1962
124.9 mm (4.9 in)
1963
110.0 mm (4.3 in)
1964
206.0 mm (8.1 in)
1965
182.2 mm (7.2 in)
1966
112.5 mm (4.4 in)
1967
160.5 mm (6.3 in)
1968
128.0 mm (5.0 in)
1969
150.9 mm (5.9 in)
1970
118.1 mm (4.6 in)
1971
128.6 mm (5.1 in)
1972
152.7 mm (6.0 in)
1973
170.4 mm (6.7 in)
1974
106.9 mm (4.2 in)
1975
136.1 mm (5.4 in)
1976
204.8 mm (8.1 in)
1977
113.3 mm (4.5 in)
1978
88.4 mm (3.5 in)
Longest dry spell (CDD)
The longest dry spell of the year at Rainbow Lake, 1928 to 1978. The record is 39 days in 1935, marked on the chart; the median year is 21 days.
Longest dry spell (CDD) at Rainbow Lake by year
Year
Longest dry spell (CDD)
1928
12 days
1929
18 days
1930
15 days
1931
22 days
1932
32 days
1933
23 days
1934
20 days
1935
39 days
1936
36 days
1937
17 days
1938
25 days
1939
38 days
1940
23 days
1941
35 days
1942
21 days
1943
23 days
1944
21 days
1945
16 days
1946
16 days
1947
29 days
1948
22 days
1949
15 days
1950
25 days
1951
23 days
1952
30 days
1953
30 days
1954
39 days
1955
17 days
1956
20 days
1957
20 days
1958
25 days
1959
20 days
1960
17 days
1961
16 days
1962
16 days
1963
32 days
1964
22 days
1965
18 days
1966
17 days
1967
19 days
1968
26 days
1969
19 days
1970
21 days
1971
16 days
1972
19 days
1973
20 days
1974
19 days
1975
19 days
1976
26 days
1977
22 days
1978
36 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
45 years with a frost
Across 45 years with a frost, the median last spring frost at Rainbow Lake falls on 15 April and the median first autumn frost on 25 October, which leaves a median of 197 days between them.
Fitted over all years, the growing season changes by -7.6 days per decade at this station.
Frost dates and growing season at Rainbow Lake
Measure
Median, all years
Earliest period
Recent period (1948 to 1978)
Recent against earliest
Fitted trend
Last spring frost
15 April
n/a
18 April
n/a
+3.7 days per decade
First autumn frost
25 October
n/a
21 October
n/a
-3.9 days per decade
Growing days
197 days
n/a
190 days
n/a
-7.6 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
43 years, 1935 to 1978
A day with at least 84.1 mm (3.3 in) of rain is expected about once in 2 years. A day with at least 185.2 mm (7.3 in) of rain is expected about once in 100 years.
Rainfall return levels at Rainbow Lake: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
84.1 mm (3.3 in)
5 years
108.4 mm (4.3 in)
10 years
125.6 mm (4.9 in)
25 years
148.5 mm (5.8 in)
50 years
166.5 mm (6.6 in)
Longer than the 43 years of record
100 years
185.2 mm (7.3 in)
Longer than the 43 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, 43 years of values from 1935 to 1978.
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: 155.2 mm (6.1 in) in 1967; 152.9 mm (6.0 in) in 1964; 152.4 mm (6.0 in) in 1949.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Rainbow Lake standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Rainbow Lake 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.