# Hermosillo in April: weather

Hermosillo, Mexico (Mexico & Central America). Ten-year climatology (2015-2024), not a forecast. Page: https://beaufixe.net/en/weather/hermosillo/april

## Key figures

| Indicator | Value |
|---|---|
| Afternoon (mean daily max) | 32.3 °C |
| Night (mean daily min) | 16 °C |
| Rainy days (≥ 1 mm) | 0 / month |
| Relative humidity | 29 % |
| Probability of a 25 °C+ afternoon | 98 % |

## Month by month

| Month | Afternoon | Night | Sea | Rain (d) |
|---|---|---|---|---|
| January | 23.5 °C | 9.7 °C | – | 2 |
| February | 25.3 °C | 11 °C | – | 2 |
| March | 28.3 °C | 13.1 °C | – | 1 |
| April | 32.3 °C | 16 °C | – | 0 |
| May | 34.4 °C | 18.4 °C | – | 0 |
| June | 39.1 °C | 24.4 °C | – | 2 |
| July | 38.6 °C | 27.3 °C | – | 8 |
| August | 38 °C | 27.1 °C | – | 8 |
| September | 36.3 °C | 24.9 °C | – | 6 |
| October | 34.1 °C | 20.5 °C | – | 1 |
| November | 28.4 °C | 14.6 °C | – | 1 |
| December | 23.9 °C | 10.7 °C | – | 2 |

Best months : May, April, October.

## Before you go

- **Safety** : Outside the areas advised against. Parts of the country are advised against (Tijuana and Tecate; the states of Chihuahua, Sinaloa, Tamaulipas, Zacatecas, Michoacán, Colima and Guerrero, except expressly exempted cities (Chihuahua, Los Mochis, Mazatlán, Morelia, Manzanillo, Ixtapa-Zihuatanejo, Tampico); south-west Guanajuato, southern Jalisco, the Guatemalan border strip); Hermosillo is not one of them. (official advice updated 11 September 2026 — https://www.gov.uk/foreign-travel-advice/mexico)
- **Entry** (British passport) : No visa needed for stays of up to 180 days. Passport valid until your return date. Keep the entry stamp or printed e-gate ticket, you must show it to leave; the Embassy recommends 180 days’ validity; Quintana Roo entry tax. (per the UK Foreign Office, 11 September 2026)
- **Vaccines** : typhoid recommended for most travellers; hepatitis A and hepatitis B if you are not already vaccinated; chikungunya depending on activities and areas visited. Routine vaccines up to date (measles in particular).
- **Yellow fever** : No yellow fever locally, vaccine not recommended. No entry requirement.
- **Malaria** : Present. Areas: Campeche, Chiapas, and the southern part of Chihuahua state Rare in the states of Oaxaca, Sinaloa, Sonora, and Tabasco No malaria transmission along the U.S.–Mexico border. Preventive medication recommended: Campeche, Chiapas, and the southern part of Chihuahua state: Atovaquone-proguanil, chloroquine, doxycycline, mefloquine, primaquine , tafenoquine All other areas with malaria transmission: No chemoprophylaxis recommended (insect bite precautions and mosquito avoidance only) — prescribed before departure.
- **Mosquitoes** : dengue and Zika reported: protect yourself from bites.
  (per the CDC, page reviewed 3 September 2026 — https://wwwnc.cdc.gov/travel/destinations/traveler/none/mexico)

## Sources

Air, rain, humidity: ERA5-Land reanalysis (Copernicus) served by Open-Meteo (CC BY 4.0). Sea: NOAA OISST. Safety: FCDO (OGL v3), zones reviewed by Beau Fixe. Entry: France Diplomatie (Licence Ouverte 2.0) / FCDO. Health: CDC (public domain). Details: https://beaufixe.net/en/legal#sources

Beau Fixe — https://beaufixe.net — not a forecast; only the authorities are authoritative for safety, entry rules and health.