Monthly outlook for Harmony Grove, CA: average high 83.1°, average low 66°. That is 0.1° above the climate normal for August. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 1 days and 0.2 inches. The warmest day looks like 9 August (90.1°), the coolest 24 August (64.1°).
83.1°/66°
Average high / low
+0.1°
Above normal
0 / 1
Wet days / normal
0.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
82.5°
83°
-0.3°
19 August – 28 August
84.1°
83.5°
+0.4°
29 August – 7 September
at normal
84.6°
—
August records over 66 years
100.6°31 August 2017All-time high
51.8°22 August 1968All-time low
Climate normals and records are computed from the nearest reference point — Escondido (5 mi).
Mon, 1090° / 69°0
90 °
Harmony Grove, Monday, 10 August
Overcast. High 90°, low 69°.
Pressure29.91 inHg
Wind10.8 mph W
Humidity44%
Visibility6.2 mi
Dew point60°
Tue, 1184° / 68°0
84 °
Harmony Grove, Tuesday, 11 August
Light rain. High 84°, low 68°.
Pressure29.94 inHg
Wind11.1 mph W
Humidity42%
Visibility6.2 mi
Dew point58°
Wed, 1283° / 67°0
83 °
Harmony Grove, Wednesday, 12 August
Clear. High 83°, low 67°.
Pressure29.88 inHg
Wind11.4 mph W
Humidity41%
Visibility6.2 mi
Dew point57°
Thu, 1380° / 65°0
80 °
Harmony Grove, Thursday, 13 August
Overcast. High 80°, low 65°.
Pressure29.91 inHg
Wind12 mph W
Humidity55%
Visibility—
Dew point58°
Fri, 1480° / 65°0
80 °
Harmony Grove, Friday, 14 August
Overcast. High 80°, low 65°.
Pressure29.97 inHg
Wind13.8 mph W
Humidity58%
Visibility—
Dew point58°
Sat, 1574° / 68°0.04
74 °
Harmony Grove, Saturday, 15 August
Light rain. High 74°, low 68°.
Pressure30.00 inHg
Wind5.2 mph W
Humidity59%
Visibility—
Dew point58°
Sun, 1681° / 66°0
81 °
Harmony Grove, Sunday, 16 August
Overcast. High 81°, low 66°.
Pressure30.06 inHg
Wind12.5 mph W
Humidity55%
Visibility—
Dew point60°
Mon, 1781° / 65°0
81 °
Harmony Grove, Monday, 17 August
Overcast. High 81°, low 65°.
Pressure30.06 inHg
Wind14 mph W
Humidity46%
Visibility—
Dew point55°
Tue, 1882° / 64°0
82 °
Harmony Grove, Tuesday, 18 August
Mostly clear. High 82°, low 64°.
Pressure29.94 inHg
Wind11.7 mph W
Humidity48%
Visibility—
Dew point56°
Wed, 1984° / 65°0
84 °
Harmony Grove, Wednesday, 19 August
Overcast. High 84°, low 65°.
Pressure29.91 inHg
Wind12.6 mph SW
Humidity45%
Visibility—
Dew point55°
Thu, 2083° / 65°0
83 °
Harmony Grove, Thursday, 20 August
Overcast. High 83°, low 65°.
Pressure29.94 inHg
Wind11 mph W
Humidity48%
Visibility—
Dew point57°
Fri, 2184° / 65°0
84 °
Harmony Grove, Friday, 21 August
Clear. High 84°, low 65°.
Pressure29.91 inHg
Wind10.8 mph W
Humidity47%
Visibility—
Dew point58°
Sat, 2285° / 66°0
85 °
Harmony Grove, Saturday, 22 August
Clear. High 85°, low 66°.
Pressure29.91 inHg
Wind11.7 mph W
Humidity39%
Visibility—
Dew point53°
Sun, 2384° / 65°0
84 °
Harmony Grove, Sunday, 23 August
Clear. High 84°, low 65°.
Pressure29.91 inHg
Wind11.9 mph W
Humidity40%
Visibility—
Dew point54°
Mon, 2485° / 64°0
85 °
Harmony Grove, Monday, 24 August
Clear. High 85°, low 64°.
Pressure29.88 inHg
Wind11.9 mph W
Humidity41%
Visibility—
Dew point54°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2584° / 65°0.02
84 °
Harmony Grove, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high84°
Average low65°
Average precipitation0.02 in
Chance of precipitation8%
Record high96° (1985)
Record low58° (2024)
Wed, 2684° / 65°0.01
84 °
Harmony Grove, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high84°
Average low65°
Average precipitation0.01 in
Chance of precipitation8%
Record high95° (2009)
Record low56° (2024)
Thu, 2785° / 66°0
85 °
Harmony Grove, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high85°
Average low66°
Average precipitation0 in
Chance of precipitation3%
Record high98° (2009)
Record low57° (1973)
Fri, 2885° / 66°0
85 °
Harmony Grove, Friday, 28 August
Climate normal for this date — 60-year average.
Average high85°
Average low66°
Average precipitation0 in
Chance of precipitation3%
Record high97° (2015)
Record low58° (1973)
Sat, 2985° / 66°0
85 °
Harmony Grove, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high85°
Average low66°
Average precipitation0 in
Chance of precipitation0%
Record high98° (2009)
Record low57° (2010)
Sun, 3085° / 66°0.01
85 °
Harmony Grove, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high85°
Average low66°
Average precipitation0.01 in
Chance of precipitation5%
Record high97° (1967)
Record low58° (2010)
Mon, 3184° / 65°0
84 °
Harmony Grove, Monday, 31 August
Climate normal for this date — 60-year average.
Average high84°
Average low65°
Average precipitation0 in
Chance of precipitation5%
Record high101° (2017)
Record low57° (1964)
Tue, 0184° / 65°0.01
84 °
Harmony Grove, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high84°
Average low65°
Average precipitation0.01 in
Chance of precipitation8%
Record high98° (2017)
Record low58° (1966)
Wed, 0284° / 66°0.01
84 °
Harmony Grove, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high84°
Average low66°
Average precipitation0.01 in
Chance of precipitation7%
Record high96° (2007)
Record low53° (1964)
Thu, 0384° / 66°0.01
84 °
Harmony Grove, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high84°
Average low66°
Average precipitation0.01 in
Chance of precipitation7%
Record high103° (1988)
Record low57° (1961)
Fri, 0485° / 66°0.01
85 °
Harmony Grove, Friday, 4 September
Climate normal for this date — 60-year average.
Average high85°
Average low66°
Average precipitation0.01 in
Chance of precipitation7%
Record high102° (1988)
Record low56° (1999)
Sat, 0585° / 66°0
85 °
Harmony Grove, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high85°
Average low66°
Average precipitation0 in
Chance of precipitation3%
Record high102° (1988)
Record low56° (1973)
Sun, 0685° / 66°0.01
85 °
Harmony Grove, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high85°
Average low66°
Average precipitation0.01 in
Chance of precipitation5%
Record high105° (2020)
Record low55° (1970)
Mon, 0784° / 66°0.01
84 °
Harmony Grove, Monday, 7 September
Climate normal for this date — 60-year average.
Average high84°
Average low66°
Average precipitation0.01 in
Chance of precipitation10%
Record high99° (2024)
Record low57° (1965)
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Harmony Grove, CA are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Harmony Grove, CA since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.