Llano Weather Records (USC00045001)

Record envelope, standing records and threshold days for Llano (USC00045001), California, United States, with 30 years of record.

Key Facts for Llano

Llano (USC00045001) is a weather station in California, United States at 34.50 latitude and -117.82 longitude, 1,037 m (3,402 ft) above sea level.
The station reports from 1916 to 1945, 30 years of record.
1,464 records set at Llano still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: California, United States, 34.50 latitude, -117.82 longitude.
Elevation: 1,037 m (3,402 ft).
Period of record: 1916 to 1945, 30 years.
Eligible elements: none yet.

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 Llano. 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 Llano, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	27.2 C (81.0 F)	-13.3 C (8.1 F)	n/a	n/a
Feb	23.9 C (75.0 F)	-10.0 C (14.0 F)	n/a	n/a
Mar	32.2 C (90.0 F)	-6.7 C (19.9 F)	n/a	n/a
Apr	32.8 C (91.0 F)	-5.6 C (21.9 F)	n/a	n/a
May	36.7 C (98.1 F)	-2.2 C (28.0 F)	n/a	n/a
Jun	43.9 C (111.0 F)	1.7 C (35.1 F)	n/a	n/a
Jul	44.4 C (111.9 F)	3.9 C (39.0 F)	n/a	n/a
Aug	42.8 C (109.0 F)	5.6 C (42.1 F)	n/a	n/a
Sep	39.4 C (102.9 F)	2.2 C (36.0 F)	n/a	n/a
Oct	35.6 C (96.1 F)	-3.9 C (25.0 F)	n/a	n/a
Nov	31.7 C (89.1 F)	-9.4 C (15.1 F)	n/a	n/a
Dec	25.6 C (78.1 F)	-10.6 C (12.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Llano still stand. 1918 holds the most, with 89.

Standing records at Llano by the year they were set
Year set	Standing records
1916	14
1917	79
1918	89
1919	25
1922	47
1923	64
1924	54
1925	67
1926	24
1927	54
1928	43
1929	63
1930	61
1931	69
1932	59
1933	81
1934	80
1935	42
1936	59
1937	78
1938	54
1939	34
1940	42
1941	33
1942	50
1943	52
1944	36
1945	11

Wettest Day of Each Month

Feb: 105.4 mm (4.1 in)

The wettest day on record for each calendar month at Llano. The most was 105.4 mm (4.1 in) on 22 February 1944.

Record daily precipitation for each month at Llano
Month	Record daily precipitation (mm)	Date
Jan	91.4 mm (3.6 in)	23 January 1943
Feb	105.4 mm (4.1 in)	22 February 1944
Mar	44.5 mm (1.8 in)	2 March 1938
Apr	31.5 mm (1.2 in)	5 April 1926
May	25.4 mm (1.0 in)	27 May 1919
Jun	26.7 mm (1.1 in)	29 June 1925
Jul	38.1 mm (1.5 in)	27 July 1917
Aug	28.7 mm (1.1 in)	10 August 1942
Sep	40.1 mm (1.6 in)	25 September 1939
Oct	30.7 mm (1.2 in)	18 October 1934
Nov	29.2 mm (1.1 in)	27 November 1926
Dec	69.9 mm (2.8 in)	11 December 1943

Period of Record Coverage

1916 to 1945

28 years of record at Llano, 1916 to 1945. 5 years have data for under 90 percent of days and are left out of rankings: 1916, 1919, 1922, 1926, 1945.

Days with data per year at Llano
Year	Days with data	Share of year	Complete
1916	61	17%	No
1917	364	100%	Yes
1918	365	100%	Yes
1919	179	49%	No
1922	319	87%	No
1923	365	100%	Yes
1924	365	100%	Yes
1925	365	100%	Yes
1926	285	78%	No
1927	365	100%	Yes
1928	366	100%	Yes
1929	357	98%	Yes
1930	365	100%	Yes
1931	365	100%	Yes
1932	366	100%	Yes
1933	365	100%	Yes
1934	365	100%	Yes
1935	365	100%	Yes
1936	366	100%	Yes
1937	363	99%	Yes
1938	365	100%	Yes
1939	365	100%	Yes
1940	366	100%	Yes
1941	365	100%	Yes
1942	334	92%	Yes
1943	365	100%	Yes
1944	365	100%	Yes
1945	114	31%	No

Latest Records

No records were set at this station in the latest data.

Climate Trend

22 complete years, 1917 to 1944

One stripe for each of 22 complete years at Llano, 1917 to 1944. Blue stripes are years cooler than the station's own mean of 15.4 C (59.8 F); red stripes are warmer. The coolest year was 1918, at 14.1 C (57.4 F), and the warmest was 1934, at 17.1 C (62.8 F). The strongest colour marks a difference of 1.7 C (3.1 F).

Annual mean temperature at Llano as warming stripes, 1917 to 1944
Year	Annual mean temperature	Difference from the station mean
1917	16.2 C	+0.78 C
1918	14.1 C	-1.31 C
1923	15.5 C	+0.04 C
1924	15.3 C	-0.17 C
1925	15.3 C	-0.16 C
1927	15.0 C	-0.42 C
1928	15.6 C	+0.15 C
1929	15.8 C	+0.32 C
1930	15.3 C	-0.19 C
1931	15.3 C	-0.18 C
1932	15.5 C	+0.06 C
1933	15.5 C	+0.06 C
1934	17.1 C	+1.68 C
1935	15.0 C	-0.49 C
1936	15.7 C	+0.22 C
1937	14.7 C	-0.72 C
1938	14.9 C	-0.51 C
1939	15.2 C	-0.27 C
1940	17.0 C	+1.53 C
1941	14.9 C	-0.54 C
1943	16.2 C	+0.80 C
1944	14.8 C	-0.60 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

1916 to 1945

Yearly extremes at Llano: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	44.4 C (111.9 F)	1930	40.6 C (105.1 F)	28
Coldest night (TNn)	-13.3 C (8.1 F)	1937	-7.2 C (19.0 F)	28
Wettest day (Rx1day)	105.4 mm (4.1 in)	1944	30.5 mm (1.2 in)	30
Wettest five days (Rx5day)	183.2 mm (7.2 in)	1944	44.5 mm (1.8 in)	30
Longest dry spell (CDD)	219 days	1928	97 days	30

Hottest day (TXx)

The hottest day of the year at Llano, 1916 to 1945. The record is 44.4 C (111.9 F) in 1930, marked on the chart; the median year is 40.6 C (105.1 F).

Hottest day (TXx) at Llano by year
Year	Hottest day (TXx)
1916	31.1 C (88.0 F)
1917	42.2 C (108.0 F)
1918	38.9 C (102.0 F)
1919	38.9 C (102.0 F)
1920	n/a
1921	n/a
1922	40.6 C (105.1 F)
1923	40.0 C (104.0 F)
1924	40.6 C (105.1 F)
1925	40.6 C (105.1 F)
1926	37.8 C (100.0 F)
1927	40.0 C (104.0 F)
1928	40.6 C (105.1 F)
1929	40.6 C (105.1 F)
1930	44.4 C (111.9 F)
1931	41.1 C (106.0 F)
1932	41.1 C (106.0 F)
1933	42.8 C (109.0 F)
1934	42.8 C (109.0 F)
1935	40.0 C (104.0 F)
1936	40.6 C (105.1 F)
1937	38.9 C (102.0 F)
1938	41.1 C (106.0 F)
1939	37.2 C (99.0 F)
1940	40.6 C (105.1 F)
1941	41.1 C (106.0 F)
1942	43.9 C (111.0 F)
1943	41.7 C (107.1 F)
1944	42.2 C (108.0 F)
1945	31.7 C (89.1 F)

Coldest night (TNn)

The coldest night of the year at Llano, 1916 to 1945. The record is -13.3 C (8.1 F) in 1937, marked on the chart; the median year is -7.2 C (19.0 F).

Coldest night (TNn) at Llano by year
Year	Coldest night (TNn)
1916	-8.3 C (17.1 F)
1917	-8.3 C (17.1 F)
1918	-6.1 C (21.0 F)
1919	-7.2 C (19.0 F)
1920	n/a
1921	n/a
1922	-5.6 C (21.9 F)
1923	-7.8 C (18.0 F)
1924	-7.8 C (18.0 F)
1925	-5.6 C (21.9 F)
1926	-10.6 C (12.9 F)
1927	-6.7 C (19.9 F)
1928	-7.2 C (19.0 F)
1929	-8.9 C (16.0 F)
1930	-7.8 C (18.0 F)
1931	-9.4 C (15.1 F)
1932	-8.9 C (16.0 F)
1933	-11.1 C (12.0 F)
1934	-4.4 C (24.1 F)
1935	-7.2 C (19.0 F)
1936	-6.7 C (19.9 F)
1937	-13.3 C (8.1 F)
1938	-5.0 C (23.0 F)
1939	-6.1 C (21.0 F)
1940	-7.8 C (18.0 F)
1941	-5.0 C (23.0 F)
1942	-6.7 C (19.9 F)
1943	-8.9 C (16.0 F)
1944	-6.1 C (21.0 F)
1945	-5.6 C (21.9 F)

Wettest day (Rx1day)

The wettest day of the year at Llano, 1916 to 1945. The record is 105.4 mm (4.1 in) in 1944, marked on the chart; the median year is 30.5 mm (1.2 in).

Wettest day (Rx1day) at Llano by year
Year	Wettest day (Rx1day)
1916	20.3 mm (0.8 in)
1917	38.1 mm (1.5 in)
1918	29.2 mm (1.1 in)
1919	31.8 mm (1.3 in)
1920	30.5 mm (1.2 in)
1921	48.3 mm (1.9 in)
1922	38.1 mm (1.5 in)
1923	16.5 mm (0.6 in)
1924	21.6 mm (0.9 in)
1925	26.7 mm (1.1 in)
1926	31.5 mm (1.2 in)
1927	33.0 mm (1.3 in)
1928	31.8 mm (1.3 in)
1929	23.6 mm (0.9 in)
1930	30.5 mm (1.2 in)
1931	49.0 mm (1.9 in)
1932	25.4 mm (1.0 in)
1933	30.5 mm (1.2 in)
1934	30.7 mm (1.2 in)
1935	22.9 mm (0.9 in)
1936	21.6 mm (0.9 in)
1937	23.9 mm (0.9 in)
1938	45.7 mm (1.8 in)
1939	40.1 mm (1.6 in)
1940	30.5 mm (1.2 in)
1941	35.6 mm (1.4 in)
1942	28.7 mm (1.1 in)
1943	91.4 mm (3.6 in)
1944	105.4 mm (4.1 in)
1945	14.0 mm (0.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at Llano, 1916 to 1945. The record is 183.2 mm (7.2 in) in 1944, marked on the chart; the median year is 44.5 mm (1.8 in).

Wettest five days (Rx5day) at Llano by year
Year	Wettest five days (Rx5day)
1916	20.3 mm (0.8 in)
1917	38.1 mm (1.5 in)
1918	44.4 mm (1.7 in)
1919	38.0 mm (1.5 in)
1920	16.5 mm (0.6 in)
1921	68.6 mm (2.7 in)
1922	40.6 mm (1.6 in)
1923	16.5 mm (0.6 in)
1924	32.8 mm (1.3 in)
1925	30.5 mm (1.2 in)
1926	61.0 mm (2.4 in)
1927	74.3 mm (2.9 in)
1928	40.7 mm (1.6 in)
1929	29.2 mm (1.1 in)
1930	68.4 mm (2.7 in)
1931	75.9 mm (3.0 in)
1932	74.7 mm (2.9 in)
1933	89.0 mm (3.5 in)
1934	60.7 mm (2.4 in)
1935	24.2 mm (1.0 in)
1936	58.0 mm (2.3 in)
1937	48.3 mm (1.9 in)
1938	114.8 mm (4.5 in)
1939	43.9 mm (1.7 in)
1940	44.5 mm (1.8 in)
1941	66.8 mm (2.6 in)
1942	31.2 mm (1.2 in)
1943	168.9 mm (6.6 in)
1944	183.2 mm (7.2 in)
1945	25.4 mm (1.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at Llano, 1916 to 1945. The record is 219 days in 1928, marked on the chart; the median year is 97 days.

Longest dry spell (CDD) at Llano by year
Year	Longest dry spell (CDD)
1916	53 days
1917	150 days
1918	89 days
1919	35 days
1920	96 days
1921	62 days
1922	19 days
1923	20 days
1924	61 days
1925	43 days
1926	59 days
1927	129 days
1928	219 days
1929	84 days
1930	192 days
1931	77 days
1932	138 days
1933	117 days
1934	148 days
1935	97 days
1936	121 days
1937	89 days
1938	101 days
1939	97 days
1940	85 days
1941	111 days
1942	109 days
1943	163 days
1944	191 days
1945	23 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

22 years with a frost

Across 22 years with a frost, the median last spring frost at Llano falls on 16 April and the median first autumn frost on 7 November, which leaves a median of 202 days between them.

Frost dates and growing season at Llano
Measure	Median, all years	Earliest period	Recent period (1917 to 1944)	Recent against earliest	Fitted trend
Last spring frost	16 April	n/a	16 April	n/a	n/a
First autumn frost	7 November	n/a	7 November	n/a	n/a
Growing days	202 days	n/a	202 days	n/a	n/a

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.

Download the Data

Data for Llano standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Llano 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 2026-10-14 (14 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).