Your July weather guide
HotWeather in Miami in July
Miami in July suits travellers who want hot weather and warm swimming water, but it is a poor fit if you need dry days or cool evenings. Daytime highs average around 30°C, nights stay near 26°C, and about 20 days have measurable rain. For a UK traveller, the main adjustment is the combination of heat and humidity. Go with flexible outdoor plans rather than expecting uninterrupted sunshine throughout your stay.
Long-term climate averages for Miami, not a forecast · 1991-2020
Miami, month by month
Your snapshot
At a glance
The useful details for Miami.
- Average daytime high
- 30.1°C
- 9 in 10 days stay below 31°C
- Average night-time low
- 25.9°C
- coldest 10% of nights: 25°C or lower
- Compared with London
- +8.3°C
- London averages 21.8°C in July
- Sea temperature
- 29.5°C
- year to year: 29°C to 30°C
- Sunshine per day (est.)
- 5.2h
- 39% of 13.5 h of daylight
- Rainy days (1 mm+)
- 20
- 112 mm over the month
- Humidity
- 79%
- Days over 25°C
- 100%
- 56% over 30°C
- Record high 1991-2020
- 33.3°C
- 1998-07-03
- Record low 1991-2020
- 22.7°C
- 2019-07-30
- Flight from London
- ≈ 9 h 42 min
- 7129 km, long-haul (estimate for a direct flight)
Records are observed extremes within 1991-2020, not typical holiday conditions. Warm-day percentages are shares of days, not day counts.
How July compares
July is the 1st warmest month of the year in Miami and ranks 37th of 134 destinations we compare for July - see where else is hot in July. Within United States it is 4th of 6 (United States in July). Against London's average high of 21.8°C in July, Miami is 8.3°C warmer by day and 12.4°C warmer at night.
Daytime and night-time in July
The typical July day in Miami peaks at 30.1°C, but that is an average: the warmest 10% of days reach 31.4°C or more. About 100% of days top 25°C and 1 in 2 pass 30°C. Nights average 25.9°C; one night in ten drops to 24.7°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest July day here reached 33.3°C (1998-07-03) and the coldest night 22.7°C (2019-07-30).
Rain in July
Wet (more than 8 rainy days): about 20 days with 1 mm or more, 112 mm in total. Year to year it varies a lot - the wettest July was 2013 with 202 mm, the driest 2015 with 41 mm. Humidity averages 79%, which makes the heat feel heavier than the thermometer suggests.
Sea temperature in July
The sea averages 29.5°C - warm enough to swim (22°c+). Depending on the year it ranges from 29.0°C to 30.0°C. For the warmest sea here, come in August (29.9°C).
Sunshine and daylight
Around 5.2 hours of sunshine a day (estimated from cloud cover), 13.5 hours of daylight: the sun rises about 06:39 and sets about 20:15 local time in mid-July. Average cloud cover is 61%.
Is July a good time to visit Miami?
It is a reasonable choice: hot days but expect showers. The best months for Miami on our scoring are March, February, April; months averaging 25°C or more: Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov.
Hot days, warm nights and little cooling from the sea
July is Miami's warmest month, and the heat does not ease much after dark. Humidity averages 79%, so expect the warmth to feel more demanding than the temperature alone suggests, particularly if you are walking around at midday. Loose, lightweight clothing makes sense, with shaded or air-conditioned breaks built into your plans. Evenings remain warm enough that you should not count on them for relief from the heat. The sea averages 29.5°C, making swimming an easy choice if you dislike chilly water, though it will feel warm rather than sharply refreshing. This is a better month for a relaxed pace than a packed outdoor schedule.
Keep your plans flexible around rain
Rain is a regular consideration in July, not a remote possibility. About 20 days receive measurable rain, so pack a light waterproof and leave room to change your outdoor plans. That does not mean every wet day is a washout, but it does make a holiday built entirely around dry weather a gamble. There are about 5.2 hours of sunshine within 13.5 hours of daylight: long days do not translate into constant sun. Keep indoor alternatives available and use the forecast to choose your outdoor windows. If your dates are flexible, March, February and April are better overall weather choices than July.
A little perspective
Miami through the year
July is highlighted. See how it compares with the rest of the year.
| Month | Day | Night | Sea | Sun/day | Rain mm | Rainy days | Days 25°C+ |
|---|---|---|---|---|---|---|---|
| January | 23.2°C | 18.0°C | 23.9°C | 5.3 | 52 | 8 | 32% |
| Februarybest | 24.0°C | 18.8°C | 23.7°C | 6.2 | 41 | 7 | 43% |
| Marchbest | 25.1°C | 19.7°C | 24.2°C | 6.6 | 49 | 7 | 59% |
| Aprilbest | 26.8°C | 21.6°C | 25.4°C | 7.2 | 56 | 8 | 84% |
| May | 28.2°C | 23.4°C | 26.8°C | 7.3 | 99 | 12 | 99% |
| June | 29.2°C | 25.2°C | 28.5°C | 4.8 | 158 | 20 | 100% |
| JulySelected | 30.1°C | 25.9°C | 29.5°C | 5.2 | 112 | 20 | 100% |
| August | 30.1°C | 26.0°C | 29.9°C | 4.8 | 142 | 22 | 100% |
| September | 29.3°C | 25.5°C | 29.3°C | 4.1 | 158 | 22 | 100% |
| October | 27.9°C | 24.0°C | 28.0°C | 5.2 | 118 | 15 | 97% |
| November | 25.8°C | 21.5°C | 26.3°C | 5.5 | 56 | 9 | 75% |
| December | 24.2°C | 19.6°C | 24.9°C | 5.3 | 41 | 8 | 49% |
Day = average daytime high, night = average night-time low, 1991-2020.Sun is hours per day; rainy days count 1 mm or more.
Day, night and sea
Monthly average temperatures, 1991-2020
- Day
- Night
- Sea
Best months here
On warmth, low rainfall and sunshine, start with these.
Keep exploring
Similar in July
Closest matches on daytime temperature, sea temperature and sunshine, in other countries.
Cuba · 30°C by day · sea 29°C
Varadero
Mexico · 30°C by day · sea 29°C
Tulum
Mexico · 30°C by day · sea 29°C
Playa del Carmen
Bahamas · 30°C by day · sea 29°C
Bahamas
Mexico · 30°C by day · sea 29°C
Cancun
A little more detail
Miami in July FAQs
Plain answers, grounded in the averages.
Is Miami hot in July?
Miami is hot in July: the average daytime high is 30.1°C and nights average 25.9°C. About 100% of July days reach 25°C or more.
Can you swim in the sea in Miami in July?
The sea around Miami averages 29.5°C in July, which is warm enough for most people to swim comfortably. Between 1991 and 2020 it ranged from 29°C to 30°C depending on the year.
How much does it rain in Miami in July?
Miami sees about 20 rainy days (1 mm or more) and 112 mm of rain in a typical July. The wettest July between 1991 and 2020 was 2013 (202 mm) and the driest was 2015 (41 mm).
How sunny is Miami in July?
Miami gets around 5.2 hours of sunshine a day in July out of 13.5 hours of daylight (estimated from average cloud cover).
How does Miami compare with the UK in July?
Miami is on average 8.3°C warmer than London by day in July (30.1°C against 21.8°C).
What is the hottest July on record in Miami?
Between 1991 and 2020 the hottest July day in Miami reached 33.3°C on 1998-07-03, and the coldest night dropped to 22.7°C on 2019-07-30.
How much hotter is Miami than London in July?
Miami's average daytime high is 30.1°C, compared with 21.8°C in London, a difference of 8.3°C. With humidity at 79% and nights averaging 25.9°C, expect a substantial adjustment rather than simply a warmer version of a July day at home.
Is July a good month for swimming in Miami?
Yes, if warm water is your priority. The sea averages 29.5°C, with a year-to-year range of 29°C to 30°C. It should suit swimmers who dislike cold water, but frequent rain means you still need flexibility over when to swim.
About these averages
ERA5-Land climate reanalysis via Open-Meteo (11 km grid) and NOAA Coral Reef Watch 5 km sea temperatures, 1991-2020
Averages computed from daily values at Miami. Sea temperature from the nearest 5 km sea cell, 1.9 km from that point. Sunshine hours are estimated from average cloud cover.Records are the highest and lowest daily values in that 30-year period, not all-time records. These are climate averages, not a forecast for your trip. How we measure holiday weather
- Hot · 25°C+
- Warm · 20°C to below 25°C
- Mild · 15°C to below 20°C
- Cool · below 15°C