Merced, CA

California · Records since 1899–2026

☀️ 80°F
Currently in Merced
As of 11:45 AM PDT

Records for September 7

🔥 Record High

111°F

September 7, 2022

+18° from 93° normal

❄ Record Low

42°F

September 7, 1905

-16° from 58° normal
🌞 Normal high: 93°F 🌑 Normal low: 58°F 1991–2020 normals

All-Time Records — Merced

🔥
116°F
Hottest Day Ever
Sep 6, 2022
❄
15°F
Coldest Day Ever
Dec 24, 1990
🌧
2.20"
Wettest Day Ever
Mar 9, 1911
☃
2.0"
Most Snow in One Day
Jan 1, 1916

Top 10 Record Highs — September 7

# Temp Date
🏆 111°F September 7, 2022
2 110°F September 7, 2020
3 109°F September 7, 1904
4 107°F September 7, 1923
5 106°F September 7, 2008
6 105°F September 7, 2024
7 104°F September 7, 2021
8 104°F September 7, 1977
9 104°F September 7, 1902
10 103°F September 7, 1957

Top 5 Record Lows — September 7

# Temp Date
🥶 42°F September 7, 1905
2 45°F September 7, 1901
3 47°F September 7, 1935
4 48°F September 7, 1978
5 48°F September 7, 1946
About this data — Records are sourced from the NOAA Threadex dataset via RCC ACIS, a quality-controlled record for long-term climate stations. Threadex adjusts for station relocations and observation-time changes, making records comparable across all years since 1899–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Merced

threshold: 103°F (90th percentile of historical Jun–Aug highs)
4.3
Avg heat wave length
days (historical)
107°
Avg peak temp
during heat waves
2
Dangerous nights 2026
Overnights ≥ 70°F
1
Heat waves 2026
so far

2026 Daily High Temperature vs Normal

Year to date
Above normal Below normal

154 of 249 days with data were above the 1991–2020 normal high for their date.

Days ≥ 90°F Per Year

1899–2026
84
2026 so far
96
Avg/year 1970–2025
108
Avg/year (last 10 complete)
129
Most in a year (1991)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Merced

# Dates Days Peak Avg High Avg Overnight Low
🏆 Jul 2, 1906 – Jul 15, 1906 14 109°F (Jul 12) 106°F 64°F
2 Jul 2, 2024 – Jul 13, 2024 12 111°F (Jul 6) 108°F 70°F
3 Jul 18, 1931 – Jul 28, 1931 11 112°F (Jul 27) 108°F 70°F
4 Jul 16, 2006 – Jul 26, 2006 11 112°F (Jul 23) 107°F 72°F
5 Sep 1, 2022 – Sep 9, 2022 9 116°F (Sep 6) 108°F 69°F
6 Aug 9, 1901 – Aug 17, 1901 9 110°F (Aug 12) 106°F 64°F
7 Aug 9, 1906 – Aug 17, 1906 9 109°F (Aug 16) 106°F 66°F
8 Jul 31, 1901 – Aug 7, 1901 8 111°F (Aug 3) 106°F 71°F
9 Aug 9, 1996 – Aug 16, 1996 8 110°F (Aug 13) 107°F 69°F
10 Jul 10, 1917 – Jul 17, 1917 8 108°F (Jul 13) 104°F 68°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

Nights where the overnight low exceeded the 1991–2020 normal low

56
2026 total
above-normal nights
36.4
Avg / summer
1970–2020
76
Most in a summer
2014

Above-Normal Summer Nights Per Year

Average June–August Low by Decade

Overnight lows · complete decades only

Precipitation

Actual vs. 1991–2020 full-month and full-season normals

4.23"
2026 YTD
Normal: 8.18"
-3.95"
0.00"
September so far
September normal: 0.05"
-0.05"
0
2026 heavy rain days
Days with ≥ 1.0"

2026 Accumulation vs. Normal

Running total since Jan 1 against the normal pace for the same date · Merced is 3.95" behind the normal pace

Monthly Precipitation — Last 24 Months

Blue = actual · dashed line = monthly normal

Annual Precipitation Per Year (1899–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1899, annual totals have trended +0.09" per decade, about +1.1" across the record.

Heavy Rain Days Per Year (≥ 1.0")

Compare year-to-year changes in days with heavy rainfall (≥ 1.0")

Month in Review — August 2026

80.7°F

Average temperature · August 2026

35th-warmest month on record

7th-warmest August of 122 on record

+2.7° vs. 78.0° average (1991–2020)
85.4°F
Warmest month ever
July 2024
82.6°F
Warmest August ever
1967
27
Days ≥ 90°F
in August
105°F
Hottest of 2026
Aug 9

Longest 90°F Streak in August

12 consecutive days with highs of at least 90°F (Aug 1–12, 2026, peaking at 105°F)

The longest August streak since 2025 (1 year). The August record is 31 days, set in 1967.

Average August Temperature by Year

1899–2026 · 2026 highlighted · trend +0.17° per decade (warming since 1899)

Precipitation — August 2026

Month total against the 1991–2020 average and every other August on record

0.00"
Total precipitation
August 2026
+0.00"
vs. average
Normal: 0.00"
1st-driest
August rank
of 113 on record
0.49"
Wettest August ever
1965 · driest 0.00" (1902)

August Precipitation by Year

1899–2026 · 2026 highlighted

Wettest Augusts on Record

# Year Total
1 1965 0.49"
2 1916 0.25"
3 1983 0.23"
4 1976 0.22"
5 1899 0.14"
6 1964 0.13"
7 1975 0.11"
8 1991 0.11"
9 1904 0.10"
10 1941 0.08"

Driest Augusts on Record

# Year Total
1 2026 0.00"
2 2025 0.00"
3 2024 0.00"
4 2022 0.00"
5 2021 0.00"
6 2020 0.00"
7 2019 0.00"
8 2018 0.00"
9 2017 0.00"
10 2016 0.00"

Warmest Augusts on Record

# Year Avg Temp
1 1967 82.6°F
2 2022 81.5°F
3 2020 81.4°F
4 2012 81.4°F
5 1958 81.1°F
6 1901 80.8°F
7 1961 80.7°F
8 2017 80.7°F
9 2026 80.7°F
10 1966 80.6°F

Warmest Months on Record (Any Month)

# Month Avg Temp
1 July 2024 85.4°F
2 July 1931 84.2°F
3 July 1906 84.1°F
4 July 1908 83.6°F
5 July 2021 83.3°F
6 July 1917 83.1°F
7 July 2014 82.8°F
8 July 2006 82.7°F
9 July 1933 82.6°F
10 August 1967 82.6°F

Nearby Stations — August 2026

How the same month ranked at the closest reporting stations

Station Avg Temp August Rank
Merced, CA 80.7°F 7th of 122
Madera, CA 81.1°F 8th of 85
Fresno, CA 86.1°F 4th of 139
Stockton, CA 78.1°F 23rd of 130
San Jose, CA 70.4°F 25th of 127
About this data. Monthly averages are the mean of daily average temperatures, computed from NOAA Threadex records via RCC ACIS. Months missing more than three days of observations are excluded from the rankings, so the in-progress month never appears. Rankings cover 1,413 complete months on record. Precipitation totals sum the daily reports for the month, with trace amounts counted as zero. A month missing any day of precipitation data is left out entirely (an unreported day is unreported rain), so the precipitation ranking covers 113 complete Augusts. Normals are the 1991–2020 mean for the same calendar month. Trend lines are a least-squares fit across every year shown.

Fall in Review — Fall 2026

September 1 – November 30, 2026

Fall 2026 is still under way. Season totals and rankings appear once November closes; the markers below update as they happen.

Summer to Winter — 2026

Each turning point of the season against its 1991–2020 normal date, with the earliest and latest on record

Marker 2026 Normal vs. normal Earliest Latest Drift
Last 90°F day
The final day of summer heat
 Aug 30
so far
 Oct 10 Aug 31, 1911 Nov 5, 2010 +0.2 d/decade
Last 80°F day
The last genuinely warm afternoon
 Sep 6
so far
 Oct 31 Sep 29, 1916 Nov 18, 2008 +0.3 d/decade
First high below 50°F
The first afternoon that stays cold
 not yet Dec 13 Nov 11, 1985 Dec 30, 1980 -0.2 d/decade
First 32°F freeze
Growing season over
 not yet Nov 24 Sep 22, 1906 Dec 27, 2014 +1.1 d/decade
First 28°F hard freeze
Cold enough to end tender growth
 not yet Dec 5 Oct 14, 1905 Dec 27, 1966 +0.5 d/decade

Drift is a least-squares fit across every year on record. Positive means the marker has been arriving later.

First Freeze by Year

The first 32°F night of each autumn since 1899 · trending +1.1 days later per decade

273
Normal length
1991–2020 average
329
Longest on record
1997
145
Shortest on record
1906

Growing Season Length by Year

Days between the last spring freeze and the first fall freeze · trending +2.7 days longer per decade

Fall Average Temperature by Year

1899–2025 · 2026 highlighted · trend +0.21° per decade (warming since 1899)

Fall Precipitation by Year

1901–2025 · 2026 highlighted · trend +0.02" per decade (wetter since 1901)

About this data. Fall is meteorological autumn, September 1 through November 30, the window NOAA uses for seasonal statistics. Seasonal temperature is the day-weighted mean of the three monthly means; precipitation is their sum, and a season missing any of the three months is left out of the rankings. Freeze, heat and snow markers come from daily NOAA Threadex observations via RCC ACIS: freezes and snow are the first occurrence on or after July 1, and the last 90°F and 80°F days are the final ones anywhere in the calendar year. Growing season counts the freeze-free days between the last spring 32°F and the first fall 32°F.
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