Twin Falls Sun Valley Rgnl AP Weather Records (USW00094178)

Record envelope, standing records and threshold days for Twin Falls Sun Valley Rgnl AP (USW00094178), Idaho, United States, with 30 years of record.

Key Facts for Twin Falls Sun Valley Rgnl AP

Twin Falls Sun Valley Rgnl AP (USW00094178) is a weather station in Idaho, United States at 42.48 latitude and -114.48 longitude, 1,270 m (4,166 ft) above sea level.
The station reports from 1997 to 2026, 30 years of record.
1,464 records set at Twin Falls Sun Valley Rgnl AP still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Idaho, United States, 42.48 latitude, -114.48 longitude.
Elevation: 1,270 m (4,166 ft).
Period of record: 1997 to 2026, 30 years.
Eligible elements: none yet.

Daily Record Envelope and 2026

24 days at or beyond a record

The band shows the record high and record low for each calendar day at Twin Falls Sun Valley Rgnl AP. The lines show the 2026 daily maximum and minimum. 24 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Twin Falls Sun Valley Rgnl AP, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	16.1 C (61.0 F)	-26.0 C (-14.8 F)	11.7 C (53.1 F)	-14.9 C (5.2 F)
Feb	18.3 C (64.9 F)	-20.0 C (-4.0 F)	14.4 C (57.9 F)	-14.3 C (6.3 F)
Mar	26.1 C (79.0 F)	-12.7 C (9.1 F)	25.6 C (78.1 F)	-4.3 C (24.3 F)
Apr	32.2 C (90.0 F)	-7.1 C (19.2 F)	28.3 C (82.9 F)	-3.2 C (26.2 F)
May	37.8 C (100.0 F)	-4.4 C (24.1 F)	33.9 C (93.0 F)	1.7 C (35.1 F)
Jun	39.4 C (102.9 F)	1.1 C (34.0 F)	33.9 C (93.0 F)	3.3 C (37.9 F)
Jul	41.7 C (107.1 F)	5.0 C (41.0 F)	36.7 C (98.1 F)	10.6 C (51.1 F)
Aug	39.4 C (102.9 F)	3.3 C (37.9 F)	36.1 C (97.0 F)	11.7 C (53.1 F)
Sep	38.9 C (102.0 F)	-4.4 C (24.1 F)	33.9 C (93.0 F)	4.4 C (39.9 F)
Oct	33.3 C (91.9 F)	-15.6 C (3.9 F)	28.3 C (82.9 F)	-5.6 C (21.9 F)
Nov	24.4 C (75.9 F)	-20.5 C (-4.9 F)	21.7 C (71.1 F)	-5.6 C (21.9 F)
Dec	17.2 C (63.0 F)	-24.3 C (-11.7 F)	17.2 C (63.0 F)	-8.9 C (16.0 F)

Which Years Hold Standing Records

1,464 standing records

1,464 records at Twin Falls Sun Valley Rgnl AP still stand. 2015 holds the most, with 100.

Standing records at Twin Falls Sun Valley Rgnl AP by the year they were set
Year set	Standing records
1997	21
1998	42
1999	75
2000	46
2001	48
2002	66
2003	71
2004	46
2005	50
2006	46
2007	42
2008	41
2009	46
2010	50
2011	44
2012	51
2013	71
2014	78
2015	100
2016	35
2017	56
2018	31
2019	38
2020	45
2021	41
2022	69
2023	42
2024	32
2025	41

Wettest Day of Each Month

Aug: 50.8 mm (2.0 in)

The wettest day on record for each calendar month at Twin Falls Sun Valley Rgnl AP. The most was 50.8 mm (2.0 in) on 6 August 2014.

Record daily precipitation for each month at Twin Falls Sun Valley Rgnl AP
Month	Record daily precipitation (mm)	Date
Jan	14.5 mm (0.6 in)	10 January 2006
Feb	12.2 mm (0.5 in)	14 February 2000
Mar	17.8 mm (0.7 in)	26 March 2003
Apr	20.3 mm (0.8 in)	20 April 2005
May	26.2 mm (1.0 in)	29 May 2005
Jun	37.3 mm (1.5 in)	8 June 2006
Jul	16.3 mm (0.6 in)	31 July 2021
Aug	50.8 mm (2.0 in)	6 August 2014
Sep	26.9 mm (1.1 in)	22 September 2016
Oct	27.7 mm (1.1 in)	24 October 2010
Nov	26.9 mm (1.1 in)	2 November 2015
Dec	24.1 mm (0.9 in)	8 December 2004

Period of Record Coverage

1997 to 2025

29 years of record at Twin Falls Sun Valley Rgnl AP, 1997 to 2025. 1 years have data for under 90 percent of days and are left out of rankings: 1997.

Days with data per year at Twin Falls Sun Valley Rgnl AP
Year	Days with data	Share of year	Complete
1997	176	48%	No
1998	365	100%	Yes
1999	364	100%	Yes
2000	361	99%	Yes
2001	364	100%	Yes
2002	364	100%	Yes
2003	359	98%	Yes
2004	363	99%	Yes
2005	365	100%	Yes
2006	365	100%	Yes
2007	365	100%	Yes
2008	365	100%	Yes
2009	364	100%	Yes
2010	365	100%	Yes
2011	365	100%	Yes
2012	365	100%	Yes
2013	365	100%	Yes
2014	365	100%	Yes
2015	365	100%	Yes
2016	365	100%	Yes
2017	364	100%	Yes
2018	365	100%	Yes
2019	365	100%	Yes
2020	366	100%	Yes
2021	364	100%	Yes
2022	365	100%	Yes
2023	365	100%	Yes
2024	363	99%	Yes
2025	365	100%	Yes

Latest Records

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

Climate Trend

28 complete years, 1998 to 2025

One stripe for each of 28 complete years at Twin Falls Sun Valley Rgnl AP, 1998 to 2025. Blue stripes are years cooler than the station's own mean of 10.3 C (50.5 F); red stripes are warmer. The coolest year was 2019, at 9.1 C (48.5 F), and the warmest was 2015, at 11.9 C (53.5 F). The strongest colour marks a difference of 1.7 C (3.1 F).

Annual mean temperature at Twin Falls Sun Valley Rgnl AP as warming stripes, 1998 to 2025
Year	Annual mean temperature	Difference from the station mean
1998	10.1 C	-0.15 C
1999	9.7 C	-0.52 C
2000	10.0 C	-0.22 C
2001	10.0 C	-0.27 C
2002	9.3 C	-0.95 C
2003	10.9 C	+0.68 C
2004	9.6 C	-0.62 C
2005	9.3 C	-0.95 C
2006	10.1 C	-0.17 C
2007	10.8 C	+0.57 C
2008	9.9 C	-0.35 C
2009	9.9 C	-0.37 C
2010	10.3 C	-0.01 C
2011	9.9 C	-0.34 C
2012	11.8 C	+1.49 C
2013	10.4 C	+0.14 C
2014	11.7 C	+1.42 C
2015	11.9 C	+1.68 C
2016	10.2 C	-0.04 C
2017	9.6 C	-0.64 C
2018	10.0 C	-0.22 C
2019	9.1 C	-1.12 C
2020	10.3 C	+0.02 C
2021	11.0 C	+0.69 C
2022	9.3 C	-0.92 C
2023	9.7 C	-0.53 C
2024	10.8 C	+0.53 C
2025	11.3 C	+1.05 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

1997 to 2026

Yearly extremes at Twin Falls Sun Valley Rgnl AP: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	41.7 C (107.1 F)	2003	38.3 C (100.9 F)	30
Coldest night (TNn)	-26.0 C (-14.8 F)	2016	-17.7 C (0.1 F)	30
Wettest day (Rx1day)	50.8 mm (2.0 in)	2014	17.5 mm (0.7 in)	29
Wettest five days (Rx5day)	94.3 mm (3.7 in)	2014	29.8 mm (1.2 in)	29
Longest dry spell (CDD)	107 days	2018	50 days	29

Hottest day (TXx)

The hottest day of the year at Twin Falls Sun Valley Rgnl AP, 1997 to 2026. The record is 41.7 C (107.1 F) in 2003, marked on the chart; the median year is 38.3 C (100.9 F).

Hottest day (TXx) at Twin Falls Sun Valley Rgnl AP by year
Year	Hottest day (TXx)
1997	37.8 C (100.0 F)
1998	40.0 C (104.0 F)
1999	37.2 C (99.0 F)
2000	38.3 C (100.9 F)
2001	38.3 C (100.9 F)
2002	41.1 C (106.0 F)
2003	41.7 C (107.1 F)
2004	36.7 C (98.1 F)
2005	37.8 C (100.0 F)
2006	39.4 C (102.9 F)
2007	40.6 C (105.1 F)
2008	38.3 C (100.9 F)
2009	38.3 C (100.9 F)
2010	37.8 C (100.0 F)
2011	37.2 C (99.0 F)
2012	38.3 C (100.9 F)
2013	39.4 C (102.9 F)
2014	40.0 C (104.0 F)
2015	38.9 C (102.0 F)
2016	37.2 C (99.0 F)
2017	37.2 C (99.0 F)
2018	38.3 C (100.9 F)
2019	37.8 C (100.0 F)
2020	38.3 C (100.9 F)
2021	37.8 C (100.0 F)
2022	38.9 C (102.0 F)
2023	38.3 C (100.9 F)
2024	39.4 C (102.9 F)
2025	36.7 C (98.1 F)
2026	37.8 C (100.0 F)

Coldest night (TNn)

The coldest night of the year at Twin Falls Sun Valley Rgnl AP, 1997 to 2026. The record is -26.0 C (-14.8 F) in 2016, marked on the chart; the median year is -17.7 C (0.1 F).

Coldest night (TNn) at Twin Falls Sun Valley Rgnl AP by year
Year	Coldest night (TNn)
1997	-13.3 C (8.1 F)
1998	-22.2 C (-8.0 F)
1999	-12.8 C (9.0 F)
2000	-12.8 C (9.0 F)
2001	-15.0 C (5.0 F)
2002	-17.8 C (0.0 F)
2003	-13.9 C (7.0 F)
2004	-20.0 C (-4.0 F)
2005	-18.9 C (-2.0 F)
2006	-18.2 C (-0.8 F)
2007	-17.1 C (1.2 F)
2008	-17.7 C (0.1 F)
2009	-22.7 C (-8.9 F)
2010	-16.6 C (2.1 F)
2011	-16.6 C (2.1 F)
2012	-17.1 C (1.2 F)
2013	-21.6 C (-6.9 F)
2014	-18.8 C (-1.8 F)
2015	-24.3 C (-11.7 F)
2016	-26.0 C (-14.8 F)
2017	-24.9 C (-12.8 F)
2018	-17.7 C (0.1 F)
2019	-16.6 C (2.1 F)
2020	-13.8 C (7.2 F)
2021	-12.7 C (9.1 F)
2022	-19.9 C (-3.8 F)
2023	-19.9 C (-3.8 F)
2024	-22.1 C (-7.8 F)
2025	-14.9 C (5.2 F)
2026	-11.7 C (10.9 F)

Wettest day (Rx1day)

The wettest day of the year at Twin Falls Sun Valley Rgnl AP, 1997 to 2026. The record is 50.8 mm (2.0 in) in 2014, marked on the chart; the median year is 17.5 mm (0.7 in).

Wettest day (Rx1day) at Twin Falls Sun Valley Rgnl AP by year
Year	Wettest day (Rx1day)
1997	n/a
1998	21.1 mm (0.8 in)
1999	13.2 mm (0.5 in)
2000	12.7 mm (0.5 in)
2001	20.6 mm (0.8 in)
2002	13.0 mm (0.5 in)
2003	17.8 mm (0.7 in)
2004	24.1 mm (0.9 in)
2005	26.2 mm (1.0 in)
2006	37.3 mm (1.5 in)
2007	14.5 mm (0.6 in)
2008	17.5 mm (0.7 in)
2009	29.2 mm (1.1 in)
2010	27.7 mm (1.1 in)
2011	15.7 mm (0.6 in)
2012	19.6 mm (0.8 in)
2013	17.3 mm (0.7 in)
2014	50.8 mm (2.0 in)
2015	26.9 mm (1.1 in)
2016	26.9 mm (1.1 in)
2017	11.2 mm (0.4 in)
2018	17.5 mm (0.7 in)
2019	14.5 mm (0.6 in)
2020	17.8 mm (0.7 in)
2021	18.8 mm (0.7 in)
2022	13.2 mm (0.5 in)
2023	10.4 mm (0.4 in)
2024	16.3 mm (0.6 in)
2025	9.7 mm (0.38 in)
2026	14.7 mm (0.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at Twin Falls Sun Valley Rgnl AP, 1997 to 2026. The record is 94.3 mm (3.7 in) in 2014, marked on the chart; the median year is 29.8 mm (1.2 in).

Wettest five days (Rx5day) at Twin Falls Sun Valley Rgnl AP by year
Year	Wettest five days (Rx5day)
1997	n/a
1998	49.5 mm (1.9 in)
1999	32.7 mm (1.3 in)
2000	22.1 mm (0.9 in)
2001	23.4 mm (0.9 in)
2002	21.4 mm (0.8 in)
2003	23.7 mm (0.9 in)
2004	37.8 mm (1.5 in)
2005	41.2 mm (1.6 in)
2006	40.1 mm (1.6 in)
2007	23.2 mm (0.9 in)
2008	27.2 mm (1.1 in)
2009	48.6 mm (1.9 in)
2010	30.0 mm (1.2 in)
2011	26.1 mm (1.0 in)
2012	45.5 mm (1.8 in)
2013	17.3 mm (0.7 in)
2014	94.3 mm (3.7 in)
2015	42.4 mm (1.7 in)
2016	49.2 mm (1.9 in)
2017	21.7 mm (0.9 in)
2018	26.4 mm (1.0 in)
2019	30.0 mm (1.2 in)
2020	29.8 mm (1.2 in)
2021	32.8 mm (1.3 in)
2022	26.2 mm (1.0 in)
2023	26.8 mm (1.1 in)
2024	31.1 mm (1.2 in)
2025	22.2 mm (0.9 in)
2026	18.8 mm (0.7 in)

Longest dry spell (CDD)

The longest dry spell of the year at Twin Falls Sun Valley Rgnl AP, 1997 to 2026. The record is 107 days in 2018, marked on the chart; the median year is 50 days.

Longest dry spell (CDD) at Twin Falls Sun Valley Rgnl AP by year
Year	Longest dry spell (CDD)
1997	n/a
1998	44 days
1999	64 days
2000	52 days
2001	69 days
2002	45 days
2003	42 days
2004	26 days
2005	42 days
2006	74 days
2007	41 days
2008	41 days
2009	36 days
2010	51 days
2011	84 days
2012	50 days
2013	60 days
2014	36 days
2015	46 days
2016	55 days
2017	67 days
2018	107 days
2019	67 days
2020	45 days
2021	54 days
2022	41 days
2023	56 days
2024	30 days
2025	51 days
2026	32 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

28 years with a frost

Across 28 years with a frost, the median last spring frost at Twin Falls Sun Valley Rgnl AP falls on 8 May and the median first autumn frost on 7 October, which leaves a median of 154 days between them.

Fitted over all years, the growing season changes by +4.3 days per decade at this station.

Frost dates and growing season at Twin Falls Sun Valley Rgnl AP
Measure	Median, all years	Earliest period	Recent period (1998 to 2025)	Recent against earliest	Fitted trend
Last spring frost	8 May	n/a	8 May	n/a	-1.3 days per decade
First autumn frost	7 October	n/a	7 October	n/a	+3.0 days per decade
Growing days	154 days	n/a	154 days	n/a	+4.3 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.

Download the Data

Data for Twin Falls Sun Valley Rgnl AP standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Twin Falls Sun Valley Rgnl AP 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).