diff --git a/src/process/validation/i18n/en.ts b/src/process/validation/i18n/en.ts
index ede84533..3362078d 100644
--- a/src/process/validation/i18n/en.ts
+++ b/src/process/validation/i18n/en.ts
@@ -34,6 +34,7 @@ export const EN_ERRORS = {
     captchaTokenValidation: 'ReCAPTCHA: Token validation error',
     captchaTokenNotSpecified: 'ReCAPTCHA: Token is not specified in submission',
     captchaFailure: 'ReCaptcha: Response token not found',
-    time: '{{field}} is not a valid time',
+    time: '{{field}} is not a valid time.',
     invalidDate: '{{field}} is not a valid date',
+    number: '{{field}} is not a valid number.'
 };
diff --git a/src/process/validation/rules/__tests__/validateNumber.test.ts b/src/process/validation/rules/__tests__/validateNumber.test.ts
new file mode 100644
index 00000000..6ca89ccb
--- /dev/null
+++ b/src/process/validation/rules/__tests__/validateNumber.test.ts
@@ -0,0 +1,27 @@
+import { expect } from 'chai';
+
+import { FieldError } from 'error';
+import { simpleNumberField } from './fixtures/components';
+import { generateProcessorContext } from './fixtures/util';
+import { validateNumber } from '../validateNumber';
+
+it('Validating a valid number will return null', async () => {
+    const component = simpleNumberField;
+    const data = {
+        component: 45,
+    };
+    const context = generateProcessorContext(component, data);
+    const result = await validateNumber(context);
+    expect(result).to.equal(null);
+});
+
+it('Validating an invalid number will return a FieldError', async () => {
+    const component = simpleNumberField;
+    const data = {
+        component: 'text',
+    };
+    const context = generateProcessorContext(component, data);
+    const result = await validateNumber(context);
+    expect(result).to.be.instanceOf(FieldError);
+    expect(result?.errorKeyOrMessage).to.contain('number');
+});
diff --git a/src/process/validation/rules/clientRules.ts b/src/process/validation/rules/clientRules.ts
index 065b9dec..cb6b1c35 100644
--- a/src/process/validation/rules/clientRules.ts
+++ b/src/process/validation/rules/clientRules.ts
@@ -23,6 +23,7 @@ import { validateRequiredDayInfo } from "./validateRequiredDay";
 import { validateTimeInfo } from "./validateTime";
 import { validateUrlInfo } from "./validateUrl";
 import { validateValuePropertyInfo } from "./validateValueProperty";
+import { validateNumberInfo } from "./validateNumber";
 
 // These are the validations that are performed in the client.
 export const clientRules: ValidationRuleInfo[] = [
@@ -49,5 +50,6 @@ export const clientRules: ValidationRuleInfo[] = [
     validateRequiredDayInfo,
     validateTimeInfo,
     validateUrlInfo,
-    validateValuePropertyInfo
+    validateValuePropertyInfo,
+    validateNumberInfo
 ];
diff --git a/src/process/validation/rules/validateNumber.ts b/src/process/validation/rules/validateNumber.ts
new file mode 100644
index 00000000..283bb9ce
--- /dev/null
+++ b/src/process/validation/rules/validateNumber.ts
@@ -0,0 +1,39 @@
+import { FieldError } from '../../../error/FieldError';
+import { NumberComponent, RuleFn, RuleFnSync, ValidationContext } from '../../../types/index';
+import { ProcessorInfo } from 'types/process/ProcessorInfo';
+
+const isValidatableNumberComponent = (component: any): component is NumberComponent => {
+    return component && component.type === 'number';
+};
+
+export const shouldValidate = (context: ValidationContext) => {
+    const { component, value } = context;
+    if (!value) {
+        return false;
+    }
+    if (!isValidatableNumberComponent(component)) {
+        return false;
+    }
+    return true;
+};
+
+export const validateNumber: RuleFn = async (context: ValidationContext) => {
+    return validateNumberSync(context);
+};
+
+export const validateNumberSync: RuleFnSync = (context: ValidationContext) => {
+    const error = new FieldError('number', context);
+    const { value } = context;
+    
+    if (typeof value !== 'number')  {
+        return error;
+    }
+    return null;
+};
+
+export const validateNumberInfo: ProcessorInfo<ValidationContext, FieldError | null> = {
+    name: 'validateNumber',
+    process: validateNumber,
+    processSync: validateNumberSync,
+    shouldProcess: shouldValidate,
+};
\ No newline at end of file