diff --git a/docs/config.md b/docs/config.md
index 4118ed0..47805c5 100644
--- a/docs/config.md
+++ b/docs/config.md
@@ -43,7 +43,7 @@ config test suite.
 
 - `base_url`: absolute base URL for the Weather API. Required for generation and collection workflows.
 - `timeout`: HTTP timeout duration. Default: `10s`.
-- `precision`: numeric precision query value. Default: `1`.
+- `precision`: numeric precision query value. Default: `0`, which requests integer values where supported.
 - `units`: Weather API units query value. Default: `us`.
 - `timezone`: report timezone and Weather API timezone query value where supported. Default: `America/Chicago`.
 - `format`: Weather API response format. Must be `json`. Default: `json`.
diff --git a/docs/integrations/weatherapi.md b/docs/integrations/weatherapi.md
index 0a8d9f7..b40391d 100644
--- a/docs/integrations/weatherapi.md
+++ b/docs/integrations/weatherapi.md
@@ -69,7 +69,8 @@ The adapter sends these query parameters:
 - `format`: from `weather_api.format`; configuration validation requires `json`
 - `units`: from `weather_api.units`
 - `precision`: from `weather_api.precision` on observations, current
-  conditions, hourly forecast, and narrative forecast requests
+  conditions, hourly forecast, and narrative forecast requests; the built-in
+  default is `0`
 - `tz`: from `weather_api.timezone` on hourly forecast, narrative forecast,
   discussion, and SPC convective outlook requests
 
diff --git a/examples/config.yml b/examples/config.yml
index a1e7707..40f7bc3 100644
--- a/examples/config.yml
+++ b/examples/config.yml
@@ -1,7 +1,7 @@
 weather_api:
   base_url: https://weather.api.example.com/
   timeout: 15s
-  precision: 1
+  precision: 0
   units: us
   timezone: "America/Chicago"
   format: json
diff --git a/internal/adapters/weatherapi/client_test.go b/internal/adapters/weatherapi/client_test.go
index 405a9fe..21741bc 100644
--- a/internal/adapters/weatherapi/client_test.go
+++ b/internal/adapters/weatherapi/client_test.go
@@ -135,9 +135,15 @@ func TestFetchBundleBuildsExpectedQueries(t *testing.T) {
 			t.Fatalf("request %q missing units=us", rawURL)
 		}
 		if strings.HasPrefix(rawURL, "/forecast/") {
-			if !strings.Contains(rawURL, "precision=1") || !strings.Contains(rawURL, "tz=America%2FChicago") {
+			if !strings.Contains(rawURL, "precision=0") || !strings.Contains(rawURL, "tz=America%2FChicago") {
 				t.Fatalf("forecast request %q missing precision or tz", rawURL)
 			}
+			continue
+		}
+		if rawURL == defaultWarmupEndpoint || strings.HasPrefix(rawURL, defaultWarmupEndpoint+"?") || strings.HasPrefix(rawURL, "/observations?") {
+			if !strings.Contains(rawURL, "precision=0") {
+				t.Fatalf("request %q missing precision=0", rawURL)
+			}
 		}
 	}
 }
diff --git a/internal/config/config_test.go b/internal/config/config_test.go
index 3b32df8..e08ef42 100644
--- a/internal/config/config_test.go
+++ b/internal/config/config_test.go
@@ -28,6 +28,9 @@ func TestDefaults(t *testing.T) {
 	if cfg.WeatherAPI.Format != "json" {
 		t.Fatalf("Format = %q, want json", cfg.WeatherAPI.Format)
 	}
+	if cfg.WeatherAPI.Precision != 0 {
+		t.Fatalf("Precision = %d, want 0", cfg.WeatherAPI.Precision)
+	}
 	if cfg.Location.ID != "home" || cfg.Location.Name != "Brentwood" || cfg.Location.Region != "St. Louis Metro" {
 		t.Fatalf("Location = %#v, want home/Brentwood/St. Louis Metro", cfg.Location)
 	}
diff --git a/internal/config/defaults.go b/internal/config/defaults.go
index df68a9e..e2964a5 100644
--- a/internal/config/defaults.go
+++ b/internal/config/defaults.go
@@ -8,7 +8,7 @@ func Defaults() Config {
 	return Config{
 		WeatherAPI: WeatherAPIConfig{
 			Timeout:   10 * time.Second,
-			Precision: 1,
+			Precision: 0,
 			Units:     "us",
 			Timezone:  "America/Chicago",
 			Format:    "json",